CP2000 Response Builder
By Forrest Baumhover, CFP®, EA · Last verified October 28, 2026
Go through each change on your CP2000 notice, pick agree or disagree, and copy reply paragraphs with bracket placeholders.
What a CP2000 notice is
The IRS page on the CP2000 series says: “The income or payment information we received from third parties, such as employers or financial institutions, doesn’t match what you reported on your tax return. This difference may increase or decrease your tax or may not change it at all.” It also says: “This notice isn’t a bill and your response may be required.”
This tool walks through each change the notice proposes. For each change you pick the kind of income and whether you agree. It then drafts a reply paragraph you finish yourself, shows where the IRS manual tells the examiner to look on a return, and quotes what the IRS page says about replying. For more on the notice itself, read What a CP2000 notice means.
What this tool cannot tell you
This tool drafts a reply you finish and send yourself. It does not tell you whether the IRS is right, whether income is taxable or what you owe. The IRS notice and the IRS page govern.
This tool asks multiple-choice questions only. It never asks for a taxpayer identification number, name or address. The code on this page does not send your answers anywhere.
The Desk checked this tool against the IRS page Understanding your CP2000 series notice (Page Last Reviewed or Updated: 14-Jul-2026), IRM 4.19.3 (Manual Transmittal October 10, 2025) and Publication 5181 (12-2022). Recheck by January 31, 2027.
Answer for each change on your notice
About your reply
Your draft
Pick your position on a change to see its reply paragraph.
Common Questions
When is my reply due?
The IRS page says to reply by the date listed. Find the date on your notice. (IRS, Understanding your CP2000 series notice)
Do I need to file an amended return?
The IRS page says: “If you agree with the notice and don’t have other income, credits, or expenses to report, follow the notice’s instructions. You don’t need to amend your return.” When the notice is correct and you have other income, credits or expenses to report, the IRS page says to complete Form 1040-X and “Write "CP2000" on top of Form 1040-X”. (IRS, Understanding your CP2000 series notice)
Can someone help me reply?
Yes. The IRS page names two ways to let someone contact the IRS for you: the Authorization section on the response form, or Form 2848. It also says: “You may be eligible for free help from the Taxpayer Advocate Service (TAS).” and “You may qualify for help from a Low Income Taxpayer Clinic.” (IRS, Understanding your CP2000 series notice)
More from the Desk
More practitioner writing from Forrest Baumhover, CFP®, EA at The Federal Tax Desk on Substack.
Read The Federal Tax Desk: every Deep Dive and Cheat Sheet, with primary-source citations →