Fax numbers
- Taxpayers in the United States 855-828-2723 Fax this number
- Sending from overseas 304-707-9793 Fax this number Not toll-free
How to fax it
- Fill in Form 911 and describe the problem and the relief you’re asking for.
- Add documents that could help resolve it. The form says this can speed things up.
- If a representative is helping, fill in their 2848 or 8821 details in Section III.
- Send it from dimefax.com/send and keep the delivered confirmation.
Tips
- No answer within 30 days? Email tas.form.911.request.for.assistance@irs.gov with “No Response” in the subject.
- Send one Form 911 per problem; more than one for the same issue slows things down.
- You can also email the form to that address, but the IRS notes email isn’t encrypted.
Dimefax costs 10¢ a page and you’re only charged if the fax goes through. On the web, page credits come in packs of 50 for $4.99, 100 for $9.99 or 200 for $19.99; the Dimefax iPhone app also sells 10 for $0.99. Credits you don’t use stay in your account and last as long as you fax once a year.
Where these numbers come from
Dimefax isn’t part of, or endorsed by, the IRS. We copied these numbers from irs.gov on November 11, 2026. Agencies change their numbers: if your letter, notice or form gives a different one, use that.