IRS Form 8821 fax number
Where to fax Form 8821, Tax Information Authorization, to the IRS Centralized Authorization File (CAF) unit.
Verified October 21, 2026Checked against Instructions for Form 8821 (09/2021), Where To File Chart. The agency notes these numbers may change without notice.
| Who uses it | Office | Fax |
|---|---|---|
| Taxpayers who live in these states 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 | Memphis CAF unit | 855-214-7519 |
| Taxpayers who live in these states 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 | Ogden CAF unit | 855-214-7522 |
| APO and FPO addresses, American Samoa, the Commonwealth of the Northern Mariana Islands, Guam, the U.S. Virgin Islands, Puerto Rico, a foreign country, or otherwise outside the United States | International CAF team, Philadelphia | 855-772-3156 304-707-9785 from outside the US |
Find your number
Choose where the number applies to see it here. Every number is also in the table above.
Memphis CAF unit 855-214-7519
Ogden CAF unit 855-214-7522
International CAF team, Philadelphia 855-772-3156
Before you fax
- Use the number for the state where the taxpayer lives.
- If you checked the box on line 4 (specific use), the instructions say to mail or fax Form 8821 to the IRS office handling that matter.
- Submit Form 8821 onlineForms with an electronic signature can only be submitted online. A Secure Access account is needed.