Where to Send Your CP2000 Response

One of the most operationally important steps in the CP2000 process is also one of the most commonly mishandled: sending your response to the right address.

The IRS processes CP2000 responses at specific campus locations, and each notice includes a mailing address that routes to the campus handling your account. Sending your response anywhere other than that specific address – including a general IRS address you find online – risks processing delays that can cause your response to arrive too late or be misapplied to the wrong account.

This article explains where to find the correct mailing address, how it varies across different versions of the CP2000, how to use certified mail to protect the deadline, and what happens if a response is sent to the wrong location. Check here for forms and document templates. 

CP2000 Response Options: Upload, Fax, or Mail

If you’ve received a CP2000 notice, the IRS gives you three ways to respond: uploading your response digitally, faxing it to the campus handling your account, or mailing it. Each notice specifies which of these apply and where to send your response  – the details are printed on your specific notice, not on a generic IRS page. 

Option 1: Upload

Uploading is the fastest way to submit your response. It’s done digitally and securely, and it avoids mailing delays or misdirected paperwork entirely.

To use this option:

• You’ll need the access code printed on your notice. Each notice has a unique code tied to your account, so use the code from your own notice rather than assuming it’s a generic entry point.
• You can upload your response as a JPG, PNG, or PDF file  – so a phone photo or a scanned document both work, as long as the image is legible.

Because it’s the quickest route and reduces the risk of routing errors, uploading is generally worth trying first if your notice supports it. Click here to visit the CP2000 response upload portal. 

Option 2: Fax

Faxing (yes faxing!) remains a solid option if you don’t want to mail a physical response or can’t use the upload option. Each IRS campus that processes CP2000 notices has its own fax number, and the correct one for your notice is listed on the top left side of the page. Commonly used fax numbers include:

• Andover, MA – 877-477-9485
• Atlanta, GA – 877-477-0967
• Austin, TX – 877-477-0583
• Holtsville, NY – 877-477-9599
• Fresno, CA – 877-477-0962
• Ogden, UT – 877-477-9640
• Philadelphia, PA – 877-477-9602

Use the number on your notice, not one pulled from a general list as the campus handling your account is specific to you, and sending your fax to the wrong campus can cause the same kind of delay as a misdirected mail response.

If you’re considering an online fax service instead of a physical fax machine, it’s worth reviewing that service’s privacy and security practices before sending sensitive tax information through it.

Option 3: Mail

If you prefer to mail your response, or your notice directs you to, send it to the address printed in the top left corner of the first page of your notice. 

Why the Address on Your Notice Is the One That Matters

The address on your notice routes to the specific campus and internal unit already handling your account. A general IRS mailing address found online, or an address from a different type of correspondence, won’t reliably route to the same place. So always to use the exact address, suite number, and ZIP+4 extension as printed on your own notice, rather than substituting a similar-looking address for the same city.

Timing: When to Mail

If you’re mailing your response, sending it a few days before your deadline gives you a buffer against post office hours, closed weekends, or any last-minute errors in your package. If your deadline lands on a weekend or federal holiday, don’t assume an automatic extension without confirming it applies to your specific situation.

If a Mailed Response Goes to the Wrong Address

If you realize your mailed response went to the wrong address:

1. Call the number on your CP2000 notice and explain that a response was sent, possibly to the wrong address.
2. Have your notice number, Social Security number, and the mailing date ready.
3. Ask the representative to note your account.
4. Send a duplicate response, by certified mail, upload, or fax if still available, to the correct address, with a cover note explaining it’s a duplicate of a prior mailing.

This doesn’t guarantee both copies arrive or get matched to your account, but it improves the odds the correct unit has your documentation.

Paying a Balance vs. Sending Your Response

Some CP2000 notices include a separate payment voucher with its own mailing address, distinct from the response address. If you’re paying an agreed balance by check, use the voucher’s address for the payment and the notice’s response address for your signed response and attachments. If you’re paying online via IRS Direct Pay or EFTPS, no voucher mailing is needed. You can pay online and mail (or upload/fax) your response separately.

Summary

Your CP2000 notice will tell you which response options are available and exactly where to send each one, your applicable upload access code, fax number, or mailing address. Upload is generally the fastest and most secure option where available. If faxing, use the campus number on your notice, not a general list. If mailing, use the address in the top left corner of the first page, and consider certified mail or a designated private carrier for your own documentation of timely filing. When in doubt about a detail not confirmed here, verify directly against your notice or IRS.gov.

Return to Hub: Return to the CP2000 Forms and Documents hub for more guidance on forms, mailing instructions, and supporting paperwork.