Form 8857 fax number: request innocent spouse relief

IRS Form 8857 fax number (innocent spouse relief)

Checked against irs.gov on November 11, 2026

Fax Form 8857 and its attachments to 855-233-8558. The IRS says to use this number even if you’re dealing with an IRS employee about an exam, appeal or collection. Don’t file it with your tax return.

Fax numbers

Everyone 855-233-8558 Fax this number

How to fax it

Fill in Form 8857 and gather your attachments.
Put your name and Social Security number on every attachment.
Send it from dimefax.com/send and keep the delivered confirmation.

Tips

Got a notice of deficiency? Faxing Form 8857 doesn’t stop the 90-day deadline to petition the Tax Court.
Mail works too: Internal Revenue Service, P.O. Box 120053, Covington, KY 41012.

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

IRS: Instructions for Form 8857

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.

Questions

What is the fax number for Form 8857?

855-233-8558.

Should I send Form 8857 to the IRS employee handling my case?

The instructions say to send it to the 8857 fax number or address even if you’re communicating with an IRS employee about an examination, appeal or collection.