Fax your CP2000 response to the IRS
Fax a CP2000 response to the IRS campus printed at the top left of your notice, for example 877-477-0583 for Austin, TX or 877-477-9602 for Philadelphia, PA. The same numbers take CP2501 and CP3219A responses.
| Who | Fax number |
|---|---|
| IRS campus: Andover, MA | 877-477-9485 |
| IRS campus: Atlanta, GA | 877-477-0967 |
| IRS campus: Austin, TX | 877-477-0583 |
| IRS campus: Holtsville, NY | 877-477-9599 |
| IRS campus: Fresno, CA | 877-477-0962 |
| IRS campus: Ogden, UT | 877-477-9640 |
| IRS campus: Philadelphia, PA | 877-477-9602 |
Checked against Understanding your CP2000 notice, IRS.gov, Understanding your CP2501 notice, IRS.gov, Understanding your CP3219A notice, IRS.gov on October 12, 2026.