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Income the IRS says you left out

IRS CP2000

Income the IRS received doesn't match your return

Respond by

Reply to the notice by the date listed on it

Who sent it

IRS
Facts on this page come from that IRS page, last updated by the IRS Jul 14, 2026; read by TaxScout Oct 19, 2026.

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What this letter asks of you, what to gather, and what to ask a professional if you need one. No phone number asked.

What this letter means

Income or payment information the IRS received from third parties such as employers or banks does not match what you reported on your return. The difference may raise or lower your tax, or not change it at all; the notice is a proposal, not a bill.

The IRS matched your return against W-2s, 1099s and other forms it received and found a difference.

What to do

  1. 1Review the entire notice and follow the instructions to resolve the issue.
  2. 2If a response form is included, complete and sign it, say whether you agree or disagree, and include any supporting documentation.
  3. 3If you agree and have no other income, credits or expenses to report, follow the notice instructions; you do not need to amend your return.
  4. 4If the notice is correct but you have other items to report, file Form 1040-X and write 'CP2000' on top.
  5. 5Reply through the IRS Document Upload Tool (JPG, PNG or PDF; the access code is on the IRS page for this notice), by fax to the number for the office listed at the top left of your notice, or by mail to the address in the top left corner of the first page.

The IRS page describes two paths, one if you agree with the change and one if you do not. The response form that came with your letter is where you mark which one applies.

If you do nothing

If you do not reply or the discrepancy cannot be resolved, the IRS may send another notice and a bill.

Is this letter real?

IRS letters arrive by mail and carry a notice number, your name and the tax year. The IRS does not open contact by text, email or social media, and does not ask for payment by gift card.

Check the notice number against the official IRS site before you respond, and respond only to the address or number printed on the official page.

Common questions

What is IRS CP2000?

Income or payment information the IRS received from third parties such as employers or banks does not match what you reported on your return. The difference may raise or lower your tax, or not change it at all; the notice is a proposal, not a bill. The IRS page for it is titled 'Understanding your CP2000 series notice'.

How long do I have to respond to CP2000?

Reply to the notice by the date listed on it. The date printed on your letter controls; the IRS page for this notice is the source.

What happens if I ignore CP2000?

If you do not reply or the discrepancy cannot be resolved, the IRS may send another notice and a bill.

Is CP2000 a scam?

IRS notices arrive by mail with your name, a notice number and a tax year. Check the number on the official site before you respond, and never pay by gift card or wire on the strength of a phone call.

Do I need a CPA for CP2000?

Not always. Upload the letter and the free report explains what it asks for and what to gather; if a professional makes sense, the report says why and what to ask. TaxScout never shares your request with any firm unless you ask for that on the report.

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Not tax advice. TaxScout is not the IRS. Deadlines and steps above are quoted from the IRS page linked at the top and may change; the letter in your hand controls.