IRS fax numbers by form (SS-4, 2848, 8821)
The IRS accepts several forms by fax, and each form goes to a different number. Faxing to the wrong one usually means weeks of waiting before someone sends it back. This page lists the numbers from the IRS's own instructions, with the date we last checked them.
Checked on October 16, 2026 against the Instructions for Form SS-4 (Rev. December 2025) and the Instructions for Forms 2848 and 8821 (pages updated April 30, 2026). The IRS says these numbers can change without notice. Open the linked instructions on the day you send.
Form SS-4: apply for an EIN
Faxed applications get the EIN back by fax, generally within 4 business days. Applicants in the US can also apply online and get the number immediately. Full walkthrough: how to fax Form SS-4.
| Where your business is | Fax |
|---|---|
| One of the 50 states or DC | 855-641-6935 |
| No residence or office in any state or DC, faxing from inside the US | 855-215-1627 |
| No residence or office in any state or DC, faxing from outside the US | 304-707-9471 |
Source: Instructions for Form SS-4
Form 2848 (power of attorney) and Form 8821 (tax information authorization)
Both forms go to the IRS Centralized Authorization File (CAF) unit, and they use the same numbers. Which number depends on where you, the taxpayer, live.
| If you live in | Fax |
|---|---|
| Alabama, Arkansas, Connecticut, Delaware, District of Columbia, 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 Virginia | 855-214-7519 (Memphis) |
| 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, Wyoming | 855-214-7522 (Ogden) |
| APO and FPO addresses, American Samoa, Northern Mariana Islands, Guam, US Virgin Islands, Puerto Rico, or outside the United States | 855-772-3156, or 304-707-9785 from outside the US |
Two exceptions from the instructions:
- If you checked the box on line 4 (a specific use not recorded on the CAF), send the form to the IRS office handling that matter instead.
- If you signed electronically, you must submit online, not by fax. The IRS also offers online submission for paper-signed forms through a Secure Access account.
Full walkthroughs: how to fax Form 2848 ยท how to fax Form 8821
Sources: Instructions for Form 2848, Instructions for Form 8821
Faxing any of these from your iPhone
- Fill in and sign the form. Unsigned forms are returned.
- Add a short cover sheet with your name, phone number, the form number and the page count.
- In HonestFax, scan the pages, choose United States and enter the number from the table.
- The price shows before you send. Keep the Delivered record until the IRS processes the form.
Step-by-step basics: how to send a fax from your iPhone. All our IRS walkthroughs are in one place: faxing the IRS.
Other IRS forms
The IRS takes more forms by fax than these three - Form 2553 (S corporation election), Form 4506-T (tax transcripts), Form 14039 (identity theft) and others. Search them all, filtered by your state, in our IRS fax number finder.
Many IRS letters and notices also give their own fax number for your reply. When a letter lists a fax number, use that one, not a general number from the internet. If your fax keeps failing or saying busy, see fax to IRS not going through.