An IRS CP2000 response tells the IRS whether you agree, disagree or partly agree with proposed changes to your return. The CP2000 is not a bill or a formal audit; it is a proposal generated when income or payment information reported by employers, banks or brokers does not match what you filed. You answer on the enclosed response form by the date shown.
If the proposed amount looks wrong or you are unsure how to respond, call (415) 754-0115 to schedule a free consultation, or reach us through the contact page.
Why you received a CP2000
The IRS's Automated Underreporter program compares each return with the information returns filed under your Social Security number. When something is missing or does not line up, the system calculates what your tax would be if the third-party figure were right. Frequent causes include:
- Stock or other investment sales reported by a broker without cost basis, so the IRS treats the entire sale proceeds as gain.
- Payment app and marketplace income on a 1099-K that you reported elsewhere, such as on Schedule C.
- Retirement rollovers coded as taxable distributions.
- Interest or dividends from a small account you forgot about.
- Cancelled debt on a 1099-C, even when an exclusion such as insolvency may apply.
- Duplicate reporting of the same income by two payers.
Your three options for an IRS CP2000 response
1. You agree with every change
Check the agreement box, sign and date the response form, and return it. On a joint return, both spouses sign. If you cannot pay the proposed balance in full, you can still agree and then ask about payment arrangements such as an IRS installment agreement.
2. You disagree entirely
Check the disagreement box and attach a signed statement explaining why, with copies of documents that prove it. Be specific: identify each line of the notice you dispute and the evidence that answers it.
3. You agree with some items but not others
This is common. Indicate partial agreement, state which items you accept, and explain and document the ones you do not. The IRS will recompute based on what it accepts.
Should you file an amended return?
Generally no. The notice itself asks you not to file a Form 1040-X in response. If a corrected calculation helps explain your position, you can attach it to your response and label it clearly, but do not send it as a separate amended filing.
Documents that resolve the usual mismatches
- Cost basis: brokerage statements, trade confirmations or purchase records showing what you paid for the securities sold.
- Rollovers: the Form 5498 or statements from the receiving account showing the funds were deposited within the allowed period.
- Double-counted 1099-K income: a reconciliation showing the payments already included in your Schedule C gross receipts.
- Cancelled debt: a list of assets and liabilities immediately before the cancellation, if you are claiming insolvency.
- Income belonging to someone else: account records showing the true owner, and a corrected form from the payer if you can get one.
Always send copies, keep a set of exactly what you sent, and use a method that proves delivery. The notice lists how you can respond, which may include mail, fax or an online option.
How to write the explanation statement
Keep the signed statement short and structured. Open with your name, Social Security number, the tax year and the notice date. Then take each proposed adjustment in the order it appears on the notice: quote the line, say whether you agree, and in one or two sentences explain why, pointing to the exhibit that proves it. Number the exhibits and put the most important document first in each group. Finish with a corrected tax computation if it helps, and sign. An examiner reading dozens of responses a day should be able to see within a minute what you accept, what you dispute and where the proof sits. Avoid long narratives about how the error happened unless they bear directly on a penalty.
Deadlines and what silence triggers
The response date is printed on the notice, typically about 30 days out. If you need more time, call the number on the notice before that date and ask. If the IRS hears nothing, it generally treats silence as agreement and issues a statutory notice of deficiency, often a CP3219A. From that point, your main route to contest the tax without paying first is a timely Tax Court petition within 90 days.
The notice may also propose an accuracy-related penalty and interest. Penalties can sometimes be removed where you had reasonable cause, which is worth raising in your response. Remember that a federal change often leads to a matching adjustment from the California Franchise Tax Board later.
When to get legal help
Simple mismatches can often be handled directly. Consider representation when the proposed amount is large, when several years show similar problems, when a response has already been rejected, or when the income in question raises sensitive issues. The Somal Law Firm, the Pleasanton practice of attorney Bob Somal, Esq., handles IRS disputes, tax audits and appeals for individuals and small businesses throughout the Tri-Valley, Alameda and Contra Costa Counties, and can prepare the response and speak with the IRS on your behalf.
Frequently asked questions
Does a CP2000 mean I am being audited?
Not technically. It is an automated matching inquiry. It can still lead to a binding assessment if unanswered, so treat it as seriously as an audit letter.
What happens after I send my response?
The IRS may accept it and close the case, send a revised notice reflecting what it accepted, or issue a notice of deficiency if it still disagrees.
Can I request an appeal on a CP2000?
If the IRS rejects your response, you may be able to ask for review by the Independent Office of Appeals, and you keep your Tax Court rights once a notice of deficiency is issued.
When you contact the firm, you will be asked for the notice date and the items in dispute, then scheduled for a free consultation to plan your reply. Call (415) 754-0115, or use the contact form if that is easier.
Attorney Advertising. This article is general legal information for Bay Area residents, not legal advice, and does not create an attorney–client relationship. Every situation is different — please consult a licensed attorney about your specific circumstances.