Fax numbers
Look at the location printed at the top left of the first page of your notice. If your notice gives different instructions, follow the notice.
- Notice from Andover, MA 877-477-9485 Fax this number
- Notice from Atlanta, GA 877-477-0967 Fax this number
- Notice from Austin, TX 877-477-0583 Fax this number
- Notice from Holtsville, NY 877-477-9599 Fax this number
- Notice from Fresno, CA 877-477-0962 Fax this number
- Notice from Ogden, UT 877-477-9640 Fax this number
- Notice from Philadelphia, PA 877-477-9602 Fax this number
How to fax it
- Fill in the response form that came with the notice (agree or disagree) and sign it.
- Add your supporting documents after it, in order.
- Find the campus at the top left of the notice’s first page, and its number above.
- Send it from dimefax.com/send before the reply date, and keep the delivered confirmation.
Tips
- The IRS’s own CP2000 page says that if you use an online fax service, you should understand its privacy and security policies. Ours are at dimefax.com/privacy; every fax is encrypted in transit and at rest.
- You can also reply with the IRS Document Upload Tool, or by mail to the address on the notice.
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.