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# IRS Fax Numbers Directory: SS-4, 2848, 2553 and More

UpdatedOct 15, 2026 [![Mircea Rilă](https://singlefax.com/images/authors/mircea-rila.jpg)Mircea Rilă](https://singlefax.com/authors/mircea-rila)

\*\*There is no single general IRS fax number.\*\* Use the line for the particular form, taxpayer location and filing method. The directory below links each official number to its IRS source and a send page with that number prefilled. Numbers and routing were checked \*\*8 October 2026\*\*; recheck the linked instructions the day you send.

[Review a one-time fax quote](https://singlefax.com/send-or-receive-fax?type=send)

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![IRS Fax Numbers 2026: Find the Right Form Line](https://singlefax.com/images/versioned/cbd47e9916e59781/irs-fax-numbers-2026.jpg)

**IRS fax numbers by form (checked 14 October 2026 on IRS.gov):**

| Form | IRS fax number(s) | Chosen by | Guided page |
| --- | --- | --- | --- |
| SS-4 (EIN) | **855-641-6935**; no US location: **855-215-1627** (within the US) or **304-707-9471** (outside the US) | Whether the business or legal residence is in the 50 states or DC | [IRS SS-4 fax number](https://singlefax.com/get-ein) |
| 2848 / 8821 (CAF unit) | **855-214-7519** (Memphis), **855-214-7522** (Ogden); International CAF **855-772-3156** or **304-707-9785** (outside the US) | Taxpayer's residence | [Where to fax Form 2848](https://singlefax.com/file-2848) |
| 2553 (S-corp election) | **855-887-7734** (Kansas City), **855-214-7520** (Ogden) | State of the principal business, office or agency | [Form 2553 fax and mail](https://singlefax.com/file-2553) |
| 3911 (refund trace) | Eight individual lines, such as **855-297-7736** (New York); businesses **855-307-3124** (Cincinnati) or **855-578-2550** (Ogden) | State you live in; business location | [Form 3911 fax numbers](https://singlefax.com/file-3911) |
| 4506-T (transcript) | **855-587-9604** (Austin), **855-298-1145** (Ogden), **855-821-0094** (Kansas City) | State when the return was filed, and transcript type | [Form 4506-T fax numbers](https://singlefax.com/file-4506-t) |

The full directory below adds the exact state rules, Forms 5472, 7004, 8802, 8655, 8233, 15397 and 8508, and a prefilled send link for each number.

For detailed preparation, use the [SS-4 / EIN guide](https://singlefax.com/blog/apply-for-ein-by-fax-ss4), [Form 2848 guide](https://singlefax.com/blog/fax-form-2848-irs-power-of-attorney-2026), [Form 2553 guide](https://singlefax.com/blog/fax-form-2553-s-corp-election-2026) or [Form 4506-T guide](https://singlefax.com/blog/fax-form-4506-t-tax-transcript-2026). Each handles its own form and routing rules.

> **Need to send an ordinary document?** [Review a one-time fax quote](https://singlefax.com/send-or-receive-fax?type=send). $0.99 covers up to 10 pages, pay only if delivered.

## IRS fax number by form (official numbers and send links)

**Confirm the “who uses it” rule before pressing send.** A prefilled number reduces typing; it does not choose the correct office for you. Guided filing prices are SingleFax service fees, separate from any IRS fee, and not the price of simply transmitting your own completed document.

| Form | Who uses this destination | Official fax | Send | Official source | Guided SingleFax service |
| --- | --- | --- | --- | --- | --- |
| SS-4 | Legal residence / principal business, office or agency in a state or DC | **855-641-6935** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018556416935&name=IRS&office=EIN%20Operation) | [IRS](https://www.irs.gov/filing/where-to-file-your-taxes-for-form-ss-4) | [EIN $19.99](https://singlefax.com/get-ein) |
| SS-4 | No such location in a state/DC; faxing from within the US | **855-215-1627** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018552151627&name=IRS&office=EIN%20International%20Operation) | [IRS](https://www.irs.gov/filing/where-to-file-your-taxes-for-form-ss-4) | [EIN $19.99](https://singlefax.com/get-ein) |
| SS-4 | No such location in a state/DC; faxing from outside the US | **304-707-9471** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0013047079471&name=IRS&office=EIN%20International%20Operation) | [IRS](https://www.irs.gov/filing/where-to-file-your-taxes-for-form-ss-4) | [EIN $19.99](https://singlefax.com/get-ein) |
| 2848 / 8821 | Memphis CAF state group below; general CAF authorizations | **855-214-7519** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018552147519&name=IRS&office=CAF%20Unit%20Memphis) | [IRS](https://www.irs.gov/instructions/i2848) | [2848 $14.99](https://singlefax.com/file-2848) / [8821 $14.99](https://singlefax.com/file-8821) |
| 2848 / 8821 | Ogden CAF state group below; general CAF authorizations | **855-214-7522** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018552147522&name=IRS&office=CAF%20Unit%20Ogden) | [IRS](https://www.irs.gov/instructions/i2848) | [2848 $14.99](https://singlefax.com/file-2848) / [8821 $14.99](https://singlefax.com/file-8821) |
| 2848 / 8821 | International CAF: territories, Puerto Rico, APO/FPO, foreign / outside US | **855-772-3156** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018557723156&name=IRS&office=International%20CAF%20Team) | [IRS](https://www.irs.gov/instructions/i2848) | [2848 $14.99](https://singlefax.com/file-2848) / [8821 $14.99](https://singlefax.com/file-8821) |
| 2848 / 8821 | International CAF, number for use from outside the US | **304-707-9785** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0013047079785&name=IRS&office=International%20CAF%20Team) | [IRS](https://www.irs.gov/instructions/i2848) | [2848 $14.99](https://singlefax.com/file-2848) / [8821 $14.99](https://singlefax.com/file-8821) |
| 2553 | Kansas City state group below; principal business, office or agency | **855-887-7734** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018558877734&name=IRS&office=Form%202553%20Kansas%20City) | [IRS](https://www.irs.gov/filing/where-to-file-your-taxes-for-form-2553) | [2553 $49; late-election service $79](https://singlefax.com/file-2553) |
| 2553 | Ogden state group below; principal business, office or agency | **855-214-7520** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018552147520&name=IRS&office=Form%202553%20Ogden) | [IRS](https://www.irs.gov/filing/where-to-file-your-taxes-for-form-2553) | [2553 $49; late-election service $79](https://singlefax.com/file-2553) |
| 5472 + pro forma 1120 | Foreign-owned US disregarded entity under the special instructions | **855-887-7737** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018558877737&name=IRS&office=Ogden%20PIN%20Unit) | [IRS](https://www.irs.gov/instructions/i5472) | [5472 $29.99](https://singlefax.com/file-5472) |
| 7004 | Associated extension for that foreign-owned US DE filing | **855-887-7737** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018558877737&name=IRS&office=Ogden%20PIN%20Unit) | [IRS](https://www.irs.gov/instructions/i5472) | [7004 $4.99](https://singlefax.com/file-7004) |
| 4506-T | Austin row of the current individual-transcript chart | **855-587-9604** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018555879604&name=IRS&office=RAIVS%20Austin) | [IRS](https://www.irs.gov/filing/where-to-file-addresses-for-filing-form-4506-t) | [4506-T $9.99](https://singlefax.com/file-4506-t) |
| 4506-T | Ogden row of the appropriate individual / all-other chart | **855-298-1145** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018552981145&name=IRS&office=RAIVS%20Ogden) | [IRS](https://www.irs.gov/filing/where-to-file-addresses-for-filing-form-4506-t) | [4506-T $9.99](https://singlefax.com/file-4506-t) |
| 4506-T | Kansas City row of the appropriate individual / all-other chart | **855-821-0094** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018558210094&name=IRS&office=RAIVS%20Kansas%20City) | [IRS](https://www.irs.gov/filing/where-to-file-addresses-for-filing-form-4506-t) | [4506-T $9.99](https://singlefax.com/file-4506-t) |
| 8802 | After electronic IRS fee payment; toll-free line within US | **877-824-9110** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018778249110&name=IRS&office=US%20Residency%20Certification) | [IRS](https://www.irs.gov/instructions/i8802) | [8802 $29.99; IRS fee separate](https://singlefax.com/file-8802) |
| 8802 | After electronic IRS fee payment; non-toll-free line inside / outside US | **304-707-9792** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0013047079792&name=IRS&office=US%20Residency%20Certification) | [IRS](https://www.irs.gov/instructions/i8802) | [8802 $29.99; IRS fee separate](https://singlefax.com/file-8802) |
| 8655 | Reporting-agent authorization; no more than 25 forms per transmission | **855-214-7523** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018552147523&name=IRS&office=RAF%20Team%20Ogden) | [IRS](https://www.irs.gov/pub/irs-pdf/f8655.pdf) | [8655 $19.99](https://singlefax.com/file-8655) |
| 8233 | Withholding agent forwards accepted form; 25-page transmission cap | **267-941-1365** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0012679411365&name=IRS&office=Form%208233%20Philadelphia) | [IRS](https://www.irs.gov/instructions/i8233) | [8233 $19.99](https://singlefax.com/file-8233) |
| 3911 | Refund trace: eight individual refund inquiry units by state, two business units | **Varies by state** (for example 855-297-7736 for New York) | [See all 3911 numbers](https://singlefax.com/file-3911) | [IRS](https://www.irs.gov/forms-pubs/about-form-3911) | [3911 $9.99](https://singlefax.com/file-3911) |
| 15397 | Extension to furnish recipient statements; domestic fax route | **877-477-0572** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018774770572&name=IRS&office=Extension%20of%20Time%20Coordinator) | [IRS](https://www.irs.gov/pub/irs-pdf/f15397.pdf) | [Upload your completed form](https://singlefax.com/send-or-receive-fax?type=send) |
| 15397 | Same recipient-statement extension, international fax route | **304-579-4105** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0013045794105&name=IRS&office=Extension%20of%20Time%20Coordinator) | [IRS](https://www.irs.gov/pub/irs-pdf/f15397.pdf) | [Upload your completed form](https://singlefax.com/send-or-receive-fax?type=send) |
| 8508 | Electronic-filing waiver under current form; domestic fax route | **877-477-0572** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018774770572&name=IRS&office=Extension%20of%20Time%20Coordinator) | [IRS](https://www.irs.gov/pub/irs-pdf/f8508.pdf) | [Upload your completed form](https://singlefax.com/send-or-receive-fax?type=send) |
| 8508 | Same waiver, international fax route | **304-579-4105** | [Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0013045794105&name=IRS&office=Extension%20of%20Time%20Coordinator) | [IRS](https://www.irs.gov/pub/irs-pdf/f8508.pdf) | [Upload your completed form](https://singlefax.com/send-or-receive-fax?type=send) |

All rows checked **2026-10-08**. Forms 2848 and 8821 have separate instructions with matching general CAF numbers; a specific-use authorization may instead go to the IRS office handling that matter. The linked guides explain exceptions. Do not treat a number shared by two forms as a general-purpose IRS inbox.

### Form 2848 and 8821 CAF state groups

**Memphis:** AL, AR, CT, DE, DC, FL, GA, IL, IN, KY, LA, ME, MD, MA, MI, MS, NH, NJ, NY, NC, OH, PA, RI, SC, TN, VT, VA and WV.

**Ogden:** AK, AZ, CA, CO, HI, ID, IA, KS, MN, MO, MT, NE, NV, NM, ND, OK, OR, SD, TX, UT, WA, WI and WY.

Use the International CAF row for the territories, Puerto Rico, APO/FPO, foreign-country or otherwise outside-US cases listed in the instructions. These are taxpayer-residence rules. A representative's office location is not automatically the taxpayer's routing location.

For Form 8821 preparation, use the [tax-information authorization guide](https://singlefax.com/blog/fax-form-8821-tax-information-authorization-2026). Form 8821 permits specified information access; it does not grant the same representation authority as Form 2848.

### Form 2553 state groups

**Kansas City:** CT, DE, DC, GA, IL, IN, KY, ME, MD, MA, MI, NH, NJ, NY, NC, OH, PA, RI, SC, TN, VT, VA, WV and WI.

**Ogden:** AL, AK, AZ, AR, CA, CO, FL, HI, ID, IA, KS, LA, MN, MS, MO, MT, NE, NV, NM, ND, OK, OR, SD, TX, UT, WA and WY.

Use the corporation's principal business, office or agency location under the current chart. **The 2553 split differs from CAF.** For example, Florida routes to Ogden for 2553 but Memphis for CAF; Wisconsin routes to Kansas City for 2553 but Ogden for CAF.

### Form 4506-T has two different routing charts

Choose **individual transcripts** or **all other transcripts** first, then match the state or location under that chart. Austin appears in the individual chart; Ogden and Kansas City appear in both with different groups. A city name alone is not enough to select the right row.

The [live IRS where-to-file page](https://www.irs.gov/filing/where-to-file-addresses-for-filing-form-4506-t) explicitly says its current addresses can differ from the printed form. The [4506-T guide](https://singlefax.com/blog/fax-form-4506-t-tax-transcript-2026) reproduces both state charts. Follow the current chart for the requested return or transcript, rather than reusing a CAF or 2553 split.

## Form-specific preparation and exceptions

### SS-4: arrange a return channel that lasts

An EIN application can be submitted by the applicable online, fax, mail or international telephone method when eligible. Fax is an option, not the only possible method for every applicant without an SSN or ITIN.

Put a working return fax number in the applicant fax-number field if you want the IRS to fax the EIN back. **Line 18 is about prior EIN applications, not your return fax number.** Keep the line active long enough for processing; a 24-hour number is usually too short for this task.

The checked IRS processing-status page lists faxed SS-4 processing at ten business days after receipt, while the standing instructions still describe generally four business days under Fax-TIN. Plan around the live status and allow for special handling. The guided [EIN service for $19.99](https://singlefax.com/get-ein) includes its own 90-day return channel; an ordinary outgoing send does not.

### 2848 and 8821: signatures and specific-use routing

For faxed or mailed authorizations, follow the signature rules in the current instructions. Form 2848 requires handwritten signatures for fax or mail; an electronic signature accepted through an IRS online submission path is not automatically valid on a faxed form.

If a specific-use authorization is not recorded on CAF, follow the office handling that matter rather than blindly using the general CAF table. Keep the tax matter, form and periods precise. A delivery receipt does not establish that the authorization was recorded.

### 5472 and 7004: a limited foreign-owned DE exception

The fax route above is for the special **foreign-owned US disregarded entity** rules. The 5472 packet includes the pro forma Form 1120, with the required identifying notation. The associated 7004 follows the special route, rather than the ordinary 7004 filing address.

The [IRS instructions](https://www.irs.gov/instructions/i5472) specify fax at 300 DPI or higher for this packet. Follow that form-specific requirement and confirm the sending method's actual output capabilities; selecting a high-resolution source scan alone does not establish the negotiated transmission resolution. Do not generalize either the resolution requirement or this filing exception to every IRS form.

Use the [5472 guide](https://singlefax.com/blog/file-form-5472-by-fax) and [7004 extension guide](https://singlefax.com/blog/form-7004-extension-5472) for the complete packet and applicable deadline. A calendar-year example is not every entity's filing deadline, and a filing extension does not generally extend payment obligations.

### 8802: pay the IRS fee before the fax route

The instructions permit fax submission after electronic fee payment and entry of the confirmation number. They allow up to ten Forms 8802, including required attachments, within a maximum of 100 pages and require a cover stating the page count.

The IRS user fee is separate from SingleFax's $29.99 preparation-and-fax service. Use the [8802 guide](https://singlefax.com/blog/fax-form-8802-us-residency-certificate-2026) and current IRS payment instructions. Do not send to a certification number expecting it to process an unrelated tax return or transcript request.

### 8655 and 8233: different authorizations

Form 8655 is reporting-agent authorization, with a limit of 25 forms per fax transmission under its checked instructions. It is not interchangeable with a CAF power of attorney.

Form 8233 is handled through the withholding agent's acceptance and forwarding process. Its instructions limit fax transmissions to 25 pages and give additional timing and withholding rules. The agent's role matters; do not treat the listed number as permission to skip acceptance or required attachments.

### 15397 and 8508: furnishing extension versus filing waiver

Form 15397 concerns additional time to **furnish recipient statements**. It is not an automatic extension of the deadline to file information returns with the IRS. The current form offers online submission or fax.

Form 8508 concerns a waiver of required **electronic filing**, not extra time to file. The September 2026 form says to select one filing method: online, fax or mail. Shared fax numbers do not make these requests interchangeable. Use the [15397 guide](https://singlefax.com/blog/fax-form-15397-irs-recipient-statement-extension-2026) or [8508 guide](https://singlefax.com/blog/fax-form-8508-irs-electronic-filing-waiver-2026) for their different purposes.

## What about Form 1040, refund tracing and IRS letters?

These lines are not general Form 1040 filing destinations. Standard returns use the applicable electronic filing method or [paper mailing address](https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment). The [Form 1040 fax guide](https://singlefax.com/blog/irs-fax-number-for-1040) explains the distinction between filing a return and responding to an assigned employee's request.

For Form 3911 refund tracing or a notice response, follow the current case, location and notice instructions. A fax number printed on an IRS letter may serve that specific response. It should not be reused for unrelated forms simply because it belongs to the IRS. The guided [Form 3911 service](https://singlefax.com/file-3911) is $9.99; confirm its eligibility and routing for your request.

Never use a voice help line as a fax destination. Verify unfamiliar instructions against IRS.gov or your assigned contact, especially when a third-party page provides a number without the form and unit it serves.

## How to fax the IRS, step by step

1. **Confirm the form accepts fax.** Use the table above or the form's current instructions. If your form or situation is not listed, check [what you cannot fax to the IRS](https://singlefax.com/blog/what-you-cannot-fax-to-the-irs-2026) before sending.
2. **Pick the line by routing rule.** Choose by taxpayer location, form and unit, not by the first IRS number you find.
3. **Sign as the instructions require.** Some forms accept electronic signatures in specific channels and others do not; follow the current instructions for that form.
4. **Scan cleanly.** Black-and-white at 300 DPI or better, dark ink, no shadows or angled phone photos. Combine every page into one PDF in order.
5. **Use a minimal cover.** IRS unit, form name, page count, your name and call-back number. Keep full SSNs and account numbers off the cover.
6. **Send and keep the receipt.** Save the transmission receipt (date, time, destination, pages) with your signed copy. Delivery is not the same as IRS acceptance.

## Send a completed form or use a guided filing tool

If you already have the signed, complete packet, use a number's **Fax to this number now** link above. It opens the composer with the destination and office label filled in. Inspect those fields, all uploaded pages and the final quote before paying. An existing saved composer draft can take precedence, so confirm the visible destination even after following a prefilled link.

Ordinary sending starts at **$0.99 for up to ten document pages**, with $0 on failed delivery. Longer packets add $0.08 per document page up to 100. The composer-generated cover is excluded from billed document pages; a cover already in your uploaded PDF is part of that document.

Guided filing tools have their separate service prices shown in the table. They help prepare and transmit the relevant packet; successful delivery is distinct from IRS acceptance, EIN assignment, election approval or record processing. Keep the signed copy and transmission receipt and use the IRS's official confirmation process.

For an ordinary routing cover, [download a free template or fill one online](https://singlefax.com/fax-cover-sheet). Put the IRS unit, form reference, callback details and accurate page count on it. Keep unnecessary full identifiers off the exposed cover and follow any official instruction that requires a particular sheet or first page.

Social Security uses a separate agency and local or case-specific routes. See [how to fax Social Security](https://singlefax.com/blog/how-to-fax-social-security-ssa-2026); do not send an SSA packet to an IRS number.

## Frequently asked questions

What is the IRS CAF unit fax number?

It depends on where the taxpayer lives: 855-214-7519 (Memphis) or 855-214-7522 (Ogden) for the 50 states and DC, and 855-772-3156 for the International CAF Team (304-707-9785 from outside the US). These numbers serve Forms 2848 and 8821. See [where to fax Form 2848](https://singlefax.com/file-2848) for the state list.

What is the IRS fax number for Form 3911?

Individuals use one of eight refund inquiry lines chosen by the state they live in, for example 855-297-7736 for New York or 855-332-3068 for California. Businesses use 855-307-3124 (Cincinnati) or 855-578-2550 (Ogden). Fax only Form 3911 to these lines. The full table is on [our Form 3911 page](https://singlefax.com/file-3911).

Is there one general IRS fax number?

No. IRS fax lines serve particular forms, units or assigned cases. Choose the number using the current instructions for your form and taxpayer location. A valid IRS number can still be the wrong destination for your packet.

What is the IRS fax number for SS-4?

Use 855-641-6935 ([Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018556416935&name=IRS&office=EIN%20Operation)) for an applicant with a legal residence, principal business, office or agency in one of the 50 states or DC. If none is in a state or DC, use 855-215-1627 ([Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0018552151627&name=IRS&office=EIN%20International%20Operation)) when faxing from within the US or 304-707-9471 ([Fax to this number now](https://singlefax.com/send-or-receive-fax?type=send&to=0013047079471&name=IRS&office=EIN%20International%20Operation)) from outside the US. Confirm the current IRS chart.

Can I fax my Form 1040 to a number in this directory?

These form-specific lines are not general Form 1040 filing destinations. Standard filing is through an authorized electronic method or the applicable paper mailing address. If an assigned IRS employee requests documents for a case, follow that employee's specific instructions.

Do Form 2848 and Form 2553 use the same state split?

No. CAF authorizations and S-corp elections have different routing charts. Florida is in the Memphis CAF row but the Ogden 2553 row; Wisconsin is in the Ogden CAF row but the Kansas City 2553 row. Do not reuse one chart for the other.

Is the special Form 5472 fax line a general business tax return number?

No. The cited Form 5472 instructions give it for foreign-owned US disregarded entities submitting Form 5472 with a pro forma Form 1120 and the associated Form 7004 extension. Do not generalize that exception to every corporation or return.

Will the IRS fax my tax transcript back?

Form 4506-T fax lines receive transcript requests. The form directs mailed transcripts to the address of record; do not assume a faxed request produces a faxed reply. Use the IRS online or mail options when they meet your need.

Does a delivered fax mean the IRS accepted my filing?

No. The transmission result records delivery to the fax endpoint. IRS routing, completeness, eligibility and processing are separate. Keep the receipt and signed packet, then follow the official status or confirmation process.

Can I use an online fax service to send documents to the IRS?

Yes, for forms and cases where the IRS publishes a fax route. An online fax service sends from your browser to the same IRS fax line a machine would, and gives you a timestamped transmission receipt. It does not change which forms the IRS accepts by fax; most Form 1040 returns still cannot be faxed.

How much does it cost to fax an already completed form?

SingleFax ordinary sending starts at $0.99 for up to ten document pages, with $0 on failed delivery. Guided IRS filing tools have separate listed service fees.

## Sources

- [IRS: SS-4 fax routing](https://www.irs.gov/filing/where-to-file-your-taxes-for-form-ss-4)
- [IRS: SS-4 instructions](https://www.irs.gov/instructions/iss4)
- [IRS: Form 2848 CAF routing and signatures](https://www.irs.gov/instructions/i2848)
- [IRS: Form 8821 routing](https://www.irs.gov/instructions/i8821)
- [IRS: Form 2553 state chart](https://www.irs.gov/filing/where-to-file-your-taxes-for-form-2553)
- [IRS: Foreign-owned US disregarded entity filing](https://www.irs.gov/instructions/i5472)
- [IRS: Current RAIVS routing charts](https://www.irs.gov/filing/where-to-file-addresses-for-filing-form-4506-t)
- [IRS: Form 8802 fax limits and fee payment](https://www.irs.gov/instructions/i8802)
- [IRS: Form 8655 and fax instructions](https://www.irs.gov/pub/irs-pdf/f8655.pdf)
- [IRS: Withholding agent Form 8233 submission](https://www.irs.gov/instructions/i8233)
- [IRS: Form 15397 revision May 2026](https://www.irs.gov/pub/irs-pdf/f15397.pdf)
- [IRS: Form 8508 revision September 2026](https://www.irs.gov/pub/irs-pdf/f8508.pdf)
- [IRS: Current processing status](https://www.irs.gov/help/processing-status-for-tax-forms)
- [IRS: Paper tax return filing addresses](https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment)
- [IRS: About Form 3911 refund inquiry fax numbers](https://www.irs.gov/forms-pubs/about-form-3911)

## Send a fax

[Send a fax](https://singlefax.com/send-or-receive-fax?type=send) [Get a US or Canadian number](https://singlefax.com/send-or-receive-fax?type=receive)

## Related guides

[<h2>How to Fill Out Form SS-4 and Apply for an EIN by Fax (2026 Walkthrough)</h2>Line-by-line Form SS-4 walkthrough for an EIN by fax: what to write for foreign owners, common mistakes, the return fax and what happens after you send.UpdatedOct 14, 2026](https://singlefax.com/blog/apply-for-ein-by-fax-ss4) [<h2>Best Free Fax Numbers Online (2026): Receive Faxes Free</h2>Free fax numbers for receiving in 2026: 24-hour numbers, toll-free options, trials and public queues. How long each lasts, page limits and the catch.UpdatedOct 15, 2026](https://singlefax.com/blog/best-free-fax-numbers-online-2026) [<h2>Best Free Online Fax Services (2026): 7 Options Compared</h2>The best free online fax services in 2026 compared: free sending quotas, free receiving numbers, page caps, expiry and catches, in one table.Oct 15, 2026](https://singlefax.com/blog/best-free-online-fax-services)

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## Fax services

- [Send a fax](https://singlefax.com/send-or-receive-fax?type=send)
- [Receive faxes](https://singlefax.com/send-or-receive-fax?type=receive)
- [Free 24-hour number](https://singlefax.com/free-fax-number)
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- [Email to fax](https://singlefax.com/email-to-fax)
- [WhatsApp to fax](https://singlefax.com/whatsapp-to-fax)

## IRS filings

- [All IRS filings](https://singlefax.com/irs-filings)
- [EIN · Form SS-4](https://singlefax.com/get-ein)
- [Form 5472](https://singlefax.com/file-5472)
- [Form 7004](https://singlefax.com/file-7004)
- [Form 2553](https://singlefax.com/file-2553)
- [Form 2848](https://singlefax.com/file-2848)
- [Form 4506-T](https://singlefax.com/file-4506-t)
- [Form 8821](https://singlefax.com/file-8821)
- [Form 8802](https://singlefax.com/file-8802)
- [Form 8655](https://singlefax.com/file-8655)
- [Form 3911](https://singlefax.com/file-3911)
- [Form 8233](https://singlefax.com/file-8233)
- [NY POA-1](https://singlefax.com/file-ny-poa-1)

## Tools & resources

- [Free fax tools](https://singlefax.com/free-fax-tools)
- [Prepare a fax PDF](https://singlefax.com/prepare-fax)
- [Printable test page](https://singlefax.com/fax-test-page)
- [Cover sheets](https://singlefax.com/fax-cover-sheet)
- [Mobile app](https://singlefax.com/mobile-app)
- [Chrome extension](https://singlefax.com/chrome-extension)
- [Developers](https://singlefax.com/developers)
- [AI fax agents](https://singlefax.com/agents)
- [Versioning](https://singlefax.com/versioning)
- [Congress fax directory](https://singlefax.com/fax/congress)
- [Senate fax directory](https://singlefax.com/fax/senate)
- [Governor fax directory](https://singlefax.com/fax/governors)

## SingleFax

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```json
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Covers EIN, CAF, S-corp and transcript requests.","headline":"IRS Fax Numbers 2026: Find the Right Form Line","inLanguage":"en","thumbnailUrl":"https://singlefax.com/images/versioned/cbd47e9916e59781/irs-fax-numbers-2026.jpg","@type":["Article","BlogPosting"],"author":{"@id":"https://singlefax.com/authors/mircea-rila#person"},"image":{"@id":"https://singlefax.com/#/schema/image/1"},"isPartOf":{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#webpage"},"mainEntityOfPage":{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#webpage"},"publisher":{"@id":"https://singlefax.com/#/schema/organization/1"}},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#breadcrumb","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","name":"Guides","item":"https://singlefax.com/blog","position":1},{"@type":"ListItem","name":"IRS Fax Numbers 2026: Find the Right Form Line","item":"https://singlefax.com/blog/irs-fax-numbers-2026","position":2}]},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#/schema/question/1","@type":"Question","inLanguage":"en","name":"What is the IRS CAF unit fax number?","acceptedAnswer":{"@type":"Answer","text":"It depends on where the taxpayer lives: 855-214-7519 (Memphis) or 855-214-7522 (Ogden) for the 50 states and DC, and 855-772-3156 for the International CAF Team (304-707-9785 from outside the US). These numbers serve Forms 2848 and 8821. See where to fax Form 2848 for the state list."}},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#/schema/question/2","@type":"Question","inLanguage":"en","name":"What is the IRS fax number for Form 3911?","acceptedAnswer":{"@type":"Answer","text":"Individuals use one of eight refund inquiry lines chosen by the state they live in, for example 855-297-7736 for New York or 855-332-3068 for California. Businesses use 855-307-3124 (Cincinnati) or 855-578-2550 (Ogden). Fax only Form 3911 to these lines. The full table is on our Form 3911 page."}},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#/schema/question/3","@type":"Question","inLanguage":"en","name":"Is there one general IRS fax number?","acceptedAnswer":{"@type":"Answer","text":"No. IRS fax lines serve particular forms, units or assigned cases. Choose the number using the current instructions for your form and taxpayer location. A valid IRS number can still be the wrong destination for your packet."}},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#/schema/question/4","@type":"Question","inLanguage":"en","name":"What is the IRS fax number for SS-4?","acceptedAnswer":{"@type":"Answer","text":"Use 855-641-6935 (Fax to this number now) for an applicant with a legal residence, principal business, office or agency in one of the 50 states or DC. If none is in a state or DC, use 855-215-1627 (Fax to this number now) when faxing from within the US or 304-707-9471 (Fax to this number now) from outside the US. Confirm the current IRS chart."}},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#/schema/question/5","@type":"Question","inLanguage":"en","name":"Can I fax my Form 1040 to a number in this directory?","acceptedAnswer":{"@type":"Answer","text":"These form-specific lines are not general Form 1040 filing destinations. Standard filing is through an authorized electronic method or the applicable paper mailing address. If an assigned IRS employee requests documents for a case, follow that employee's specific instructions."}},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#/schema/question/6","@type":"Question","inLanguage":"en","name":"Do Form 2848 and Form 2553 use the same state split?","acceptedAnswer":{"@type":"Answer","text":"No. CAF authorizations and S-corp elections have different routing charts. Florida is in the Memphis CAF row but the Ogden 2553 row; Wisconsin is in the Ogden CAF row but the Kansas City 2553 row. Do not reuse one chart for the other."}},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#/schema/question/7","@type":"Question","inLanguage":"en","name":"Is the special Form 5472 fax line a general business tax return number?","acceptedAnswer":{"@type":"Answer","text":"No. The cited Form 5472 instructions give it for foreign-owned US disregarded entities submitting Form 5472 with a pro forma Form 1120 and the associated Form 7004 extension. Do not generalize that exception to every corporation or return."}},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#/schema/question/8","@type":"Question","inLanguage":"en","name":"Will the IRS fax my tax transcript back?","acceptedAnswer":{"@type":"Answer","text":"Form 4506-T fax lines receive transcript requests. The form directs mailed transcripts to the address of record; do not assume a faxed request produces a faxed reply. Use the IRS online or mail options when they meet your need."}},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#/schema/question/9","@type":"Question","inLanguage":"en","name":"Does a delivered fax mean the IRS accepted my filing?","acceptedAnswer":{"@type":"Answer","text":"No. The transmission result records delivery to the fax endpoint. IRS routing, completeness, eligibility and processing are separate. Keep the receipt and signed packet, then follow the official status or confirmation process."}},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#/schema/question/10","@type":"Question","inLanguage":"en","name":"Can I use an online fax service to send documents to the IRS?","acceptedAnswer":{"@type":"Answer","text":"Yes, for forms and cases where the IRS publishes a fax route. An online fax service sends from your browser to the same IRS fax line a machine would, and gives you a timestamped transmission receipt. It does not change which forms the IRS accepts by fax; most Form 1040 returns still cannot be faxed."}},{"@id":"https://singlefax.com/blog/irs-fax-numbers-2026#/schema/question/11","@type":"Question","inLanguage":"en","name":"How much does it cost to fax an already completed form?","acceptedAnswer":{"@type":"Answer","text":"SingleFax ordinary sending starts at $0.99 for up to ten document pages, with $0 on failed delivery. Guided IRS filing tools have separate listed service fees."}},{"@id":"https://singlefax.com/authors/mircea-rila#person","@type":"Person","jobTitle":"Founder & CEO, SingleFax","name":"Mircea Rilă","url":"https://singlefax.com/authors/mircea-rila","image":{"@id":"https://singlefax.com/#/schema/image/2"},"sameAs":["https://www.linkedin.com/in/mircearila/","https://x.com/zawasp"],"worksFor":{"@type":"Organization","name":"SingleFax","legalName":"Monocube LLC","url":"https://singlefax.com"}},{"@id":"https://singlefax.com/#/schema/organization/1","@type":"Organization","logo":"https://singlefax.com/android-chrome-512x512.png","name":"SingleFax","url":"https://singlefax.com/"},{"@id":"https://singlefax.com/#/schema/image/1","@type":"ImageObject","contentUrl":"https://singlefax.com/images/versioned/cbd47e9916e59781/irs-fax-numbers-2026.jpg","inLanguage":"en","url":"https://singlefax.com/images/versioned/cbd47e9916e59781/irs-fax-numbers-2026.jpg"},{"@id":"https://singlefax.com/#/schema/image/2","@type":"ImageObject","contentUrl":"https://singlefax.com/images/authors/mircea-rila.jpg","inLanguage":"en","url":"https://singlefax.com/images/authors/mircea-rila.jpg"}]}
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