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IRS fax numbers for the forms people actually send

Checked against IRS instructions in September 2026

The IRS routes several forms by fax and only by fax. These are the numbers, with the rule for choosing the right one. Confirm on irs.gov before sending; the IRS moves these occasionally.

Form SS-4 · apply for an EIN

Your situationFax to
No legal residence or principal place of business in any U.S. state, faxing from outside the U.S.304-707-9471
Same, but faxing from inside the U.S.855-215-1627
Principal place of business in one of the 50 states or DC855-641-6935

Processing is generally four business days by fax, about four weeks by mail. Put a return fax number on the form and the EIN notice comes back by fax. Full guide to the SS-4.

Form 5472 with pro forma Form 1120 · foreign-owned LLC

FilingFax to
Pro forma 1120 with Form 5472 attached, scanned at 300 DPI or higher855-887-7737
Form 7004 to extend that filing855-887-7737

This one cannot be e-filed at all. Due April 15, or October 15 with the extension. Full guide to Form 5472.

Form 2848 · power of attorney (and Form 8821)

Where the taxpayer isFax to
Foreign address, APO/FPO, Puerto Rico, Guam, U.S. Virgin Islands, American Samoa, Northern Mariana Islands855-772-3156 · from outside the U.S., 304-707-9785
Alabama, Arkansas, Connecticut, Delaware, DC, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Mississippi, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, West Virginia855-214-7519
Alaska, Arizona, California, Colorado, Hawaii, Idaho, Iowa, Kansas, Minnesota, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, Wisconsin, Wyoming855-214-7522

The signature has to be handwritten in ink. Full guide to Form 2848.

Responses to notices and letters

There is no single number. Each notice carries its own, printed in the response section of the letter itself. How to answer an IRS notice by fax.

Form 2553 · S corporation election

Where the entity is locatedFax to
Connecticut, Delaware, DC, Georgia, Illinois, Indiana, Kentucky, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, West Virginia, Wisconsin855-887-7734
Alabama, Alaska, Arizona, Arkansas, California, Colorado, Florida, Hawaii, Idaho, Iowa, Kansas, Louisiana, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, Wyoming855-214-7520
Scan quality matters. The IRS asks for 300 DPI or higher on these filings. A phone photo at an angle, or a dark scan, is a common reason a filing is treated as unreadable and goes nowhere. Send a clean PDF.

Not everything can be faxed: the W-7 for an ITIN and Form 8822-B go by mail only. See what the IRS will not accept by fax.

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FaxFast is not affiliated with the Internal Revenue Service. This page is a reference, not tax advice, and numbers should be confirmed on irs.gov before you send anything.