IRS Notice Lookup

The IRS says you owe money on unpaid taxes. The notice shows how much and how to pay.

Response window: Pay by the due date printed on the notice.

• Check the amount against your records.
• Pay in full, or set up a payment plan if you can’t pay it all.
• If you disagree, contact the IRS at the number on the notice.

IRS source: Understanding your CP14 notice ↗ (irs.gov page last reviewedJun 23, 2026)

A reminder that you owe a balance on one of your tax accounts, sent because the IRS hasn’t received payment or a response to the previous notice.

Response window: Pay by the due date shown on the notice.

• Pay the balance or set up a payment plan.
• If you disagree, call the toll-free number on the notice.
• You may request an appeal under the Collection Appeals Program (CAP) before collection action, following the notice’s instructions.

IRS source: Understanding your CP501 notice ↗ (irs.gov page last reviewedJul 22, 2026)

Your second reminder: the IRS hasn’t heard from you and you still have an unpaid balance.

Response window: Pay by the due date shown on the notice.

• Pay the balance or set up a payment plan.
• If you disagree, call the toll-free number on the notice.
• A Collection Appeals Program (CAP) appeal is available before collection action.

IRS source: Understanding your CP503 notice ↗ (irs.gov page last reviewedDec 16, 2025)

Your Notice of Intent to Levy (IRC §6331(d)). If the balance isn’t paid, the IRS can levy your state tax refund, search for other assets to levy (wages, bank accounts, property) and may file a Notice of Federal Tax Lien.

Response window: Pay immediately.

• Pay now, or pay what you can and set up a payment plan right away.
• If you disagree, call the number on the notice.
• A Collection Appeals Program (CAP) appeal may be requested before collection action.

IRS source: Understanding your CP504 notice ↗ (irs.gov page last reviewedDec 16, 2025)

The IRS intends to levy certain assets for unpaid taxes and is informing you of your right to a Collection Due Process (CDP) hearing.

Response window: To request a CDP hearing, file Form 12153 within 30 days from the date of the notice.

• Mark the 30-day date on your calendar; the hearing request has to be on time.
• Pay, or request a payment plan if you can’t pay in full.
• A representative (such as an Enrolled Agent with Form 2848) can contact the IRS for you.

IRS source: Understanding your CP90 notice ↗ · IRS Appeals: letters and notices offering an appeal ↗ (irs.gov page last reviewedNov 6, 2025)

The IRS hasn’t received payment for overdue taxes and intends to seize your property or rights to property. If ignored, it can levy wages or bank accounts and may file a Notice of Federal Tax Lien.

Response window: Contact the IRS immediately. To request a Collection Due Process hearing, file Form 12153 within 30 days from the date of the letter.

• Call us or the IRS right away; don’t wait for the deadline.
• Pay what you can; if you’re current on filings, an installment agreement may be possible.
• If you already paid, send proof of payment to the address on the letter.

IRS source: Understanding your LT11 notice or Letter 1058 ↗ · IRS Appeals: letters and notices offering an appeal ↗ (irs.gov page last reviewedJan 30, 2026)

The IRS corrected one or more mistakes on your return, and the amount you owe changed as a result.

Response window: If you agree, pay by the date on the notice. If you disagree, contact the IRS by the date indicated.

• Compare the changes with your copy of the return.
• If you agree, pay or arrange to pay over time, and correct your own copy (don’t send it in).
• If you disagree, call the number on the notice before the date shown.

IRS source: Understanding your CP11 notice ↗ (irs.gov page last reviewedAug 11, 2026)

The IRS corrected one or more mistakes on your return. You are now due a refund, or your refund amount changed.

Response window: If you agree, no response is needed (the IRS says to expect the refund in 4–6 weeks if you owe nothing else). If you disagree, contact the IRS by the date indicated.

• Compare the changes with your copy of the return.
• If you disagree, call the number on the notice by the date shown.

IRS source: Understanding your CP12 notice ↗ (irs.gov page last reviewedAug 11, 2026)

The IRS made changes to your tax return, and you owe because of those changes.

Response window: If you agree, pay by the date printed on the notice.

• If you agree, pay, or look at a payment plan or other options if you can’t pay in full.
• Correct your copy of the return for your records.
• If you disagree, contact the IRS at the number on the notice.

IRS source: Understanding your CP22A notice ↗ (irs.gov page last reviewedAug 11, 2026)

Income or payment information the IRS received from employers, banks or others doesn’t match your return. The notice proposes changes that may raise, lower or not change your tax. It isn’t a bill.

Response window: Reply by the date listed on the notice. IRS Appeals lists 30 days from the notice date to file a protest.

• Complete and sign the response form, saying whether you agree, with supporting documents.
• If you have other income, credits or expenses to report, a Form 1040-X may be needed.
• You can ask for more time, and a representative can respond for you with Form 2848.

IRS source: Understanding your CP2000 series notice ↗ · IRS Appeals: letters and notices offering an appeal ↗ (irs.gov page last reviewedJul 14, 2026)

Information from third parties doesn’t match the information on your return. The notice explains possible changes. It isn’t a bill, but you must respond.

Response window: Return the response form by the date listed on the notice.

• If you agree, sign the response form (both spouses if you filed jointly).
• If you don’t agree, send a signed statement and documents, including related expenses that may reduce tax.
• Extensions can be requested; a representative can reply for you with Form 2848.

IRS source: Understanding your CP2501 notice ↗

Based on information from employers, banks or others, the IRS proposes a change to your tax. It isn’t a bill or an audit; it explains the calculation and your right to challenge it in U.S. Tax Court.

Response window: 90-day response period. The Tax Court petition deadline on the notice cannot be extended by the IRS.

• If you agree, follow the notice and return Form 5564.
• If you disagree, reply right away with your information; the IRS works with you during the 90 days.
• If you want to go to Tax Court, file the petition by the date on the notice. Late petitions can’t be considered.

IRS source: Understanding your CP3219A notice ↗

You still have an unpaid balance on one of your tax accounts that needs immediate attention. The notice also explains that the State Department can deny or revoke a passport for seriously delinquent tax debt.

Response window: Requires immediate attention; pay as soon as you can.

• Pay in full online or by mail, or pay what you can and set up a plan for the rest.
• If you paid in full within the last 21 days, the IRS says to disregard the notice.
• If you’re working with a revenue officer, contact them.

IRS source: Understanding your CP71 notice ↗ (irs.gov page last reviewedAug 27, 2026)

Sent after an audit (usually by mail) proposes changes to your return, with a report of the proposed adjustments (generally Form 4549).

Response window: 30 days from the date of the letter to agree, respond or file a protest with IRS Appeals.

• If you agree, sign and return the agreement form.
• If you disagree, send documents or an explanation, or request an Appeals conference, before the date in the letter.
• If you don’t respond, the IRS may issue a Notice of Deficiency.

IRS source: IRS Appeals: Letter 525, General 30-Day Letter ↗ · Taxpayer Advocate Service: Letter 525 ↗

A Form 1040-series return was filed under your SSN or ITIN. To protect you from identity theft, the IRS needs you to verify your identity and the return before it continues processing it. If you didn’t file, you must tell the IRS.

Response window: Act immediately: call the Taxpayer Protection Program number in your letter.

• Have the letter, the return it refers to, a prior-year return (if you filed one) and supporting documents (W-2, 1099, schedules) ready.
• Use only the phone number printed in your letter.
• If you didn’t file that return, say so on the call.

IRS source: Understanding your Letter 4883C ↗ (irs.gov page last reviewedJul 20, 2026)

A Form 1040-series return was filed under your SSN or ITIN, and the IRS needs you to verify your identity and the return. If you didn’t file, you may be a victim of identity theft.

Response window: Follow the instructions on the notice promptly; the return isn’t processed until you verify.

• If your notice offers it, verify online at irs.gov/verifyreturn.
• Have the notice, the return for the year listed, a prior-year return and supporting documents ready.
• If you didn’t file, be ready to tell the IRS during verification.

IRS source: Understanding your CP5071 series notice ↗