If you receive a letter or notice from the IRS, it will explain the reason for the correspondence and provide instructions. Many of these letters and notices can be dealt with simply, without having to call or visit an IRS office.

The notice you receive covers a very specific issue about your account or tax return. Generally, the IRS will send a notice if it believes you owe additional tax, are due a larger refund, if there is a question about your tax return or a need for additional information.

Notice NumberDescriptionTopic
CP01HYou received a CP 01H notice because we were unable to process your tax return. The IRS has locked your account because the Social Security Administration informed us that the Social Security number (SSN) of the primary or secondary taxpayer on the return belongs to someone who was deceased prior to the current tax year (before January 1, 2010, for a 2010 tax return).
CP02HYou owe a balance due as a result of amending your tax return to show receipt of a grant received as a result of Hurricane Katrina, Rita or Wilma.Balance Due
CP03CYou received a tax credit (called the First-Time Homebuyer Credit) for a house you purchased. You may need to file a form to report a change in ownership to the house you purchased.
CP04Our records show that you or your spouse served in a combat zone, a qualified contingency operation, or a hazardous duty station during the tax year specified on your notice. As a result, you may be eligible for tax deferment.
CP08You may qualify for the Additional Child Tax Credit and be entitled to some additional money.Additional Child Tax Credit
CP09We’ve sent you this notice because our records indicate you may be eligible for the Earned Income Credit (EIC), but didn’t claim it on your tax return.
CP10We made a change(s) to your return because we believe there’s a miscalculation. This change(s) affected the estimated tax payment you wanted applied to your taxes for next year.Change To Your Estimated Tax Credit Amount
CP10AWe made a change(s) to your return because we believe there’s a miscalculation involving your Earned Income Credit. This change(s) affected the estimated tax payment you wanted applied to your taxes for next year.Change To Your Estimated Tax Credit Amount
CP11We made changes to your return because we believe there’s a miscalculation. You owe money on your taxes as a result of these changes.Balance Due
CP11AWe made changes to your return because we believe there’s a miscalculation involving your Earned Income Credit. You owe money on your taxes as a result of these changes.Balance Due
CP11MWe made changes to your return involving the Making Work Pay and Government Retiree Credit. You owe money on your taxes as a result of these changes.Balance Due
CP12We made changes to correct a miscalculation on your return.
CP12AWe made changes to correct the Earned Income Credit (EIC) claimed on your tax return.
CP12EWe made changes to correct a miscalculation on your return.
CP12MWe made changes to the computation of the Making Work Pay and/or Government Retiree Credits on your return.
CP12RWe made changes to the computation of the Rebate Recovery Credit on your return.
CP13We made changes to your return because we believe there’s a miscalculation. You’re not due a refund nor do you owe an additional amount because of our changes. Your account balance is zero.
CP13AWe made changes to your return because we found an error involving your Earned Income Credit. You’re not due a refund nor do you owe an additional amount because of our changes. Your account balance is zero.
CP13MWe made changes to your return involving the Making Work Pay credit or the Government Retiree Credit. You’re not due a refund nor do you owe an additional amount because of our changes. Your account balance is zero.
CP13RWe made changes to your return involving the Recovery Rebate Credit. You’re not due a refund nor do you owe an additional amount because of our changes. Your account balance is zero.
CP14We sent you this notice because you owe money on unpaid taxes.
CP14IYou owe taxes and penalties because you didn’t take out the minimum amount you had to from your traditional individual retirement arrangement (IRA). Or, you put into a tax-sheltered account more than you can legally.
CP16We sent you this notice to tell you about changes we made to your return that affect your refund. We made these changes because we believe there was a miscalculation. Our records show you owe other tax debts and we applied all or part of your refund to them.
CP19We have increased the amount of tax you owe because we believe you incorrectly claimed one or more deductions or credits.
CP20We believe you incorrectly claimed one or more deductions or credits. As a result, your refund is less than you expected.
CP21AWe made the change(s) you requested to your tax return for the tax year specified on the notice. You owe money on your taxes as a result of the change(s).Balance Due
CP21BWe made the change(s) you requested to your tax return for the tax year specified on the notice. You should receive your refund within 2-3 weeks of your notice.Refund
CP21CWe made the change(s) you requested to your tax return for the tax year specified on the notice. You’re not due a refund nor do you owe any additional amount. Your account balance for this tax form and tax year is zero.Even Balance
CP21EAs a result of your recent audit, we made changes to your tax return for the tax year specified on the notice. You owe money on your taxes as a result of these changes.Balance Due
CP21IWe made changes to your tax return for the tax year specified on the notice for Individual Retirement Arrangement (IRA) taxes. You owe money on your taxes as a result of these changes.Balance Due
CP22AWe made the change(s) you requested to your tax return for the tax year specified on the notice. You owe money on your taxes as a result of the change(s).Balance Due
CP22EAs a result of your recent audit, we made changes to your tax return for the tax year specified on the notice. You owe money on your taxes as a result of these changes.Balance Due
CP22IWe made changes to your tax return for the tax year specified on the notice for Individual Retirement Arrangement (IRA) taxes. You owe money on your taxes as a result of these changes.Balance Due
CP23We made changes to your return because we found a difference between the amount of estimated tax payments on your tax return and the amount we posted to your account. You have a balance due because of these changes.
CP24We made changes to your return because we found a difference between the amount of estimated tax payments on your tax return and the amount we posted to your account. You have a potential overpayment credit because of these changes.
CP24EWe made changes to your return because we found a difference between the amount of estimated tax payments on your tax return and the amount we posted to your account. You have a potential overpayment credit because of these changes.
CP25We made changes to your return because we found a difference between the amount of estimated tax payments on your tax return and the amount we posted to your account. You’re not due a refund nor do you owe an additional amount because of our changes. Your account balance is zero.
CP27We’ve sent you this notice because our records indicate you may be eligible for the Earned Income Credit (EIC), but didn’t claim it on your tax return.
CP30We charged you a penalty for not pre-paying enough of your tax either by having taxes withheld from your income, or by making timely estimated tax payments.
CP30AWe reduced or removed the penalty for underpayment of estimated tax reported on your tax return.
CP31Your refund check was returned to us, so you need to update your address.Refund
CP32We sent you a replacement refund check.
CP32ACall us to request your refund check.
CP39We used a refund from your spouse or former spouse to pay your past due tax debt. You may still owe money.
CP42The amount of your refund has changed because we used it to pay your spouse’s past due tax debt.
CP45We were unable to apply your overpayment to your estimated tax as you requested.Overpayment
CP49We sent you this notice to tell you we used all or part of your refund to pay a tax debt.Overpayment
CP51AWe computed the tax on your Form 1040, 1040A or 1040EZ. You owe taxes.
CP51BWe computed the tax on your Form 1040, 1040A or 1040EZ. You owe taxes.
CP51CWe computed the tax on your Form 1040, 1040A or 1040EZ. You owe taxes.
CP53We can’t provide your refund through direct deposit, so we’re sending you a refund check by mail.Direct Deposits
CP59We sent you this notice because we have no record that you filed your prior personal tax return or returns.
CP60We removed a payment erroneously applied to your account.
CP62We applied a payment to your account.
CP63We are holding your refund because you have not filed one or more tax returns and we believe you will owe tax.
CP71You received this notice to remind you of the amount you owe in tax, penalty and interest.
CP71AYou received this notice to remind you of the amount you owe in tax, penalty and interest.
CP71CYou received this notice to remind you of the amount you owe in tax, penalty and interest.
CP71DYou received this notice to remind you of the amount you owe in tax, penalty and interest.
CP88We are holding your refund because you have not filed one or more tax returns and we believe you will owe tax.
CP90CWe levied you for unpaid taxes. You have the right to a Collection Due Process hearing.
CP120You need to send us documentation of your tax-exempt status.Tax Exemptions
CP120AYour organization’s tax-exempt status has been revoked for failure to file a Form 990 series return for three consecutive years. In addition, you are no longer eligible to sponsor a tax-sheltered annuity plan (Internal Revenue Code section 403(b) retirement plan).
CP130Your tax return filing requirements may have changed: You may no longer need to pay the Alternative Minimum Tax.Filing Requirements
CP152We have received your return.Confirmation of Return Receipt
CP153We can’t provide you with your refund through a direct deposit, so we’re sending you a refund check/credit payment by mail.Refund
CP166We were unable to process your monthly payment because there were insufficient funds in your bank account.Payment Process
CP178Your tax return filing requirements may have changed: You may no longer owe excise tax.Filing Requirements
CP180/CP181We sent you this notice because your tax return is missing a schedule or form.
CP231Your refund or credit payment was returned to us and we need you to update your current address.Address Update Needed
CP259We’ve sent you this notice because our records indicate you didn’t file the required business tax return identified in the notice.
CP259AWe sent you this notice because our records indicate you did not file a required Form 990/990-EZ, Return of Organization Exempt From Income Tax.
CP259BWe sent you this notice because our records indicate you didn’t file a required Form 990-PF, Return of Private Foundation or Section 4947(a)(1) Nonexempt Charitable Trust Treated as a Private Foundation.
CP259CWe sent you this notice because our records indicate you are presumed to be a private foundation and you didn’t file a required Form 990-PF, Return of Private Foundation or Section 4947(a)(1) Nonexempt Charitable Trust Treated as a Private Foundation.
CP259DWe sent you this notice because our records indicate you did not file a required Form 990-T, Exempt Organization Business Income Tax Return.
CP259EWe sent you this notice because our records indicate you did not file a required Form 990-N, e-Postcard.
CP259FWe’re sending you this notice because our records indicate you did not file a required Form 5227, Split-Interest Trust information Return.
CP259GWe sent you this notice because our records indicate you did not file a required Form 1120-POL, U.S. Income Tax Return for Certain Political Organizations.
CP259HWe sent you this notice because our records indicate you are a tax-exempt political organization and you did not file a required Form 990/990-EZ, Return of Organization Exempt From Income Tax.
CP276AWe didn’t receive a correctly completed tax liability schedule. We normally charge a Federal Tax Deposit (FTD) penalty when this happens. We decided not to do so this time.FTD Penalty
CP276BWe didn’t receive the correct amount of tax deposits. We normally charge a Federal Tax Deposit penalty when this happens. We decided not to do so this time.FTD Penalty
CP297CWe levied you for unpaid taxes. You have the right to a Collection Due Process hearing.
CP501You have a balance due (money you owe the IRS) on one of your tax accounts.
CP503We have not heard from you and you still have an unpaid balance on one of your tax accounts.
CP504You have an unpaid amount due on your account. If you do not pay the amount due immediately, the IRS will seize (levy) your state income tax refund and apply it to pay the amount you owe.
CP504BYou have an unpaid amount due on your account. If you do not pay the amount due immediately, the IRS will seize (levy) certain property or rights to property and apply it to pay the amount you owe.
CP521This notice is to remind you that you have an installment agreement payment due. Please send your payment immediately.
CP523This notice informs you of our intent to terminate your installment agreement and seize (levy) your assets. You have defaulted on your agreement.
CP565We gave you an Individual Taxpayer Identification Number (ITIN).
CP565 (SP)Nosotros le asignamos un Número de Identificación Personal del Contribuyente (ITIN, por sus siglas en inglés).
CP566We need more information to process your application for an Individual Taxpayer Identification Number (ITIN). You may have sent us an incomplete form. You may have sent us the wrong documents.
CP566 (SP)Necesitamos más información para poder tramitar su solicitud para un Número de Identificación Personal del Contribuyente (ITIN, por sus siglas en inglés). Usted quizá nos envió un formulario incompleto. O, quizá nos envió los documentos incorrectos.
CP567We rejected your application for an Individual Taxpayer Identification Number (ITIN). You may not be eligible for an ITIN. Your documents may be invalid. We may not have received a reply when we asked for more information.
CP567 (SP)Hemos rechazado su solicitud para un Número de Identificación Personal de Contribuyente (ITIN, por sus siglas en inglés). Es posible que no reúna los requisitos para un ITIN o que sus documentos no sean válidos. O es posible que no hayamos recibido una contestación de su parte cuando solicitamos más información.
CP601Usted tiene un saldo pendiente de pago (dinero que le debe al IRS) en una de sus cuentas contributivas.
CP603No hemos recibido respuesta de parte de usted y todavía tiene un saldo sin pagar en una de sus cuentas contributivas.
CP604Usted tiene un saldo sin pagar en su cuenta. De no pagar esta cantidad inmediatemente, el IRS embargará cualquier reembolso de impuestos estatales al que tenga derecho y aplicarlo al pago de su deuda.
CP604BUsted tiene un saldo sin pagar en su cuenta. De no pagar esta cantidad inmediatemente, el IRS embargará ciertas propiedades o derechos de propiedad y lo aplicará al pago de su deuda.
CP621Este aviso es para notificarle que usted tiene un plan de pagos a plazos vencido. Por favor, envíe el pago inmediatamente.
CP623Este aviso es para informarle nuestra intención de cancelar su plan de pagos a plazos y confiscar (embargar) sus bienes. Usted incumplió en su acuerdo.
CP711Nosotros realizamos cambios a su planilla debido a que entendemos que hubo un cálculo erróneo. Como resultado de estos cambios, usted adeuda dinero por sus contribuciones.
CP712Hemos realizado cambios para corregir un error de cálculo en su planilla.
CP713Hemos realizado cambios para corregir un error de cálculo en su planilla. No se le debe un reembolso y no adeuda una cantidad de dinero adicional a causa de estos cambios. El saldo de su cuenta es cero.
CP714Le enviamos este aviso porque usted adeuda contribuciones pendientes de pago.
CP721Hicimos el(los) cambio(s) que usted solicitó a su declaración de impuestos para el año tributario que aparece en su aviso. Como resultado de éste(estos) cambio(s) usted debe dinero en sus impuestos.
CP722Hicimos el(los) cambio(s) que usted solicitó a su declaración de impuestos para el año tributario que aparece en su aviso. Como resultado de éste(estos) cambio(s) usted debe dinero en sus impuestos.
CP749Le enviamos este aviso para informarle que hemos utilizado todo o parte de su reintegro para pagar una deuda contributiva.
CP759Le enviamos este aviso porque no tenemos registro que indique que usted radicó su planilla o planillas de contribuciones personales para uno o varios años anteriores.
CP771Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP772Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP773Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP774Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP959Usted no radicó su planilla de contribución de negocios identificada en este aviso.
CP2005We accepted the information you sent us. We’re not going to change your tax return. We’ve closed our review of it.
CP2006We received your information. We’ll look at it and let you know what we’re going to do.
CP2057You need to file an amended return. We’ve received information not reported on your tax return.
CP2501You need to contact us. We’ve received information not reported on your tax return.

Other Notices and Letters

Notice or Letter NumberTitle
CP 57Notice of Insufficient Funds
CP 90/CP 297Final Notice – Notice of Intent to Levy and Notice of Your Right to a Hearing
CP 297ANotice of Levy and Notice of Your Right to a Hearing
CP 91/CP 298Final Notice Before Levy on Social Security Benefits
CP 161Request for Payment or Notice of Unpaid Balance, Balance Due
CP 2000Notice of Proposed Adjustment for Underpayment/Overpayment
Letter 0484CCollection Information Statement Requested (Form 433F/433D); Inability to Pay/Transfer
Letter 0549CBalance Due on Account is Paid
Letter 668D(LP 68)We released the taxpayer’s levy.
Letter 0681CProposal to Pay Accepted
Letter 0757CInstallment Privilege Terminated
Letter 1058 (LT 11)Final Notice prior to levy; your right to a hearing
Letter 1615 (LT 18)Mail us your overdue tax returns.
Letter 1731 (LP 64)Please help us locate a taxpayer.
Letter 1737 (LT 27)Please complete and site Form 433F, Collection Information Statement.
Letter 1961CInstallment Agreement for Direct Debit 433-G
Letter 1962CInstallment Agreement Reply to Taxpayer
Letter 2050 (LT 16)Please call us about your overdue taxes or tax return.
Letter 2257CBalance Due Total to Taxpayer
Letter 2271CInstallment Agreement for Direct Debit Revisions
Letter 2272CInstallment Agreement Cannot be Considered
Letter 2273CInstallment Agreement Accepted: Terms Explained
Letter 2318CInstallment Agreement: Payroll Deduction (F2159) Incomplete
Letter 2357CAbatement of Penalties and Interest
Letter 2603CInstallment Agreement Accepted – Notice of Federal Tax Lien Will be Filed
Letter 2604CPre-assessed Installment Agreement
Letter 2761CRequest for Combat Zone Service Dates
Letter 2789CTaxpayer Response to Reminder of Balance Due
Letter 2840CCC IAPND Installment Agreement Confirmation
Letter 3030CBalance Due Explained:Tax/Interest Not Paid
Letter 3127CRevision to Installment Agreement
Letter 3217CInstallment Agreement Accepted: Terms Explained
Letter 3228 (LT 39)Reminder notice.
Letter 4903 (LT 26)We have no record of receiving your tax returns.
Letter LP 47Address Information Request
Letter LP 59Please contact a tax attorney about the levy.
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