IRS Form 911 fax number (Taxpayer Advocate Service)
Where to fax Form 911, Request for Taxpayer Advocate Service Assistance (and Application for Taxpayer Assistance Order).
Verified October 21, 2026Checked against Form 911 (June 2026), Instructions for Form 911, How to Send this Form.
| Who uses it | Office | Fax |
|---|---|---|
| Everyone sending Form 911 from the United States | Taxpayer Advocate Service | (855) 828-2723 304-707-9793 from outside the US |
Before you fax
- From overseas, the form gives a separate fax number that is not toll-free.
- The form also lists email and mail. It warns that email submissions of Form 911 and attachments are not encrypted.
- If both spouses ask for help on a joint request, both must sign and date it.