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IRS CP13 Notice: Your Step-by-Step Response to IRS Adjustments

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Last updated 10/29/2024 by
Silas Bamigbola
Fact checked by
Ante Mazalin
Summary:
The IRS CP13 Notice is sent to taxpayers when the IRS identifies a miscalculation on their tax return, resulting in a zero balance. There is no refund or additional amount due. This notice informs the taxpayer of changes the IRS made and explains that no further action is required unless the taxpayer disagrees with the adjustments. Responding promptly is important if you want to dispute the changes, as failure to respond within 60 days will lead to forfeiting the right to appeal the IRS’s decision.
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An IRS CP13 Notice means the IRS identified a miscalculation on your tax return, but unlike other notices, there’s no amount owed or refunded. While it may seem alarming to receive an official letter from the IRS, the CP13 notice is simply an update letting you know that changes were made to your return, resulting in a zero balance. The key is to carefully review the notice and confirm that the IRS adjustments are correct. If you agree with the changes, no further action is required, but if you disagree, it’s important to respond promptly to resolve any issues.

What is an IRS CP13 Notice?

The IRS CP13 Notice is issued when the IRS makes changes to your tax return due to a calculation error. Unlike other notices that result in either a balance due (CP11) or a refund (CP12), a CP13 notice means that the IRS has adjusted your return, but those changes did not result in any additional tax liability or refund.
This notice essentially informs you that:
  • The IRS found an error on your tax return.
  • The IRS corrected the miscalculation.
  • As a result of the correction, your balance is zero, meaning no additional taxes are owed and no refund is due.
It’s important to note that while a CP13 notice does not require payment or provide a refund, you should still carefully review the changes made by the IRS to ensure they are accurate.

Pro Tip

If you disagree with the IRS adjustments, make sure to respond within the 60-day window. This preserves your right to appeal the decision in U.S. Tax Court if necessary.

Why did I receive an IRS CP13 Notice?

The IRS sends CP13 Notices when they identify and correct miscalculations on your tax return. Typically, these errors can occur in several areas, such as:
  • Incorrectly calculated tax deductions or credits
  • Errors in reported income or withholding
  • Misreporting of estimated tax payments
Once the IRS makes these corrections, the result does not affect the amount you owe or the refund you were expecting, so your balance is zero. Essentially, the IRS is notifying you of these changes for your records.

What should you do when you receive a CP13 Notice?

Receiving a CP13 notice is not necessarily cause for concern, but there are important steps to follow to ensure the accuracy of your tax return:
  1. Review the notice: Read the CP13 notice carefully to understand the changes the IRS made to your tax return. The notice will explain the specific miscalculations that were corrected.
  2. Compare the changes: Cross-check the IRS’s changes with your original tax return to verify that the adjustments were made correctly.
  3. Correct your records: If you agree with the IRS adjustments, make sure to update your personal records with the changes. Keep a copy of the CP13 notice along with your updated tax return for future reference.
  4. Take action if you disagree: If you do not agree with the IRS’s changes, you must contact the IRS within 60 days of receiving the notice to dispute the adjustments. Be prepared to provide supporting documentation.

Pro Tip

Keep a copy of your CP13 Notice and all related correspondence for your records. This documentation is essential if the IRS asks for further clarification or if an audit is triggered.

How to respond if you disagree with the IRS CP13 Notice

If, after reviewing the CP13 Notice, you find that the IRS’s adjustments are incorrect, it’s important to respond quickly. Here’s how you can dispute the changes:

Step 1: Contact the IRS

Call the toll-free number listed at the top right corner of your CP13 Notice to speak with an IRS representative. Be ready to explain why you disagree with the changes and have any supporting documentation on hand.

Step 2: Submit supporting documentation

If you choose to respond by mail, include:
  • A written explanation of why you disagree with the IRS adjustments
  • A copy of the CP13 notice
  • Copies of any relevant tax documents that support your original return
Mail these documents to the address listed on your CP13 notice. Be sure to keep copies for your records.

Step 3: Understand the timeline

You have 60 days from the date on your CP13 notice to dispute the changes. If you do not respond within this timeframe, the IRS will assume you agree with their adjustments, and you will lose your right to appeal the decision in Tax Court. After the 60-day window, your only recourse may be filing an amended tax return or a formal claim for refund.

Pro Tip

If you believe your return may contain complex issues, consider consulting a tax professional. Their expertise can help ensure that any disputes with the IRS are resolved accurately and efficiently.

Consequences of ignoring a CP13 Notice

While no immediate action is required if you agree with the IRS changes, failing to respond if you disagree can lead to significant consequences. One of the primary risks is the loss of your appeal rights. If you don’t dispute the IRS adjustments within the 60-day window, you’ll forfeit the right to challenge their decision in U.S. Tax Court, leaving you with fewer options to resolve the issue.
Additionally, if the IRS needs more information regarding your return and you fail to respond in time, your case may be referred for an audit. In such instances, an IRS audit officer will contact you within six weeks to further investigate the matter. Responding promptly is essential to avoid these complications.

Filing an amended tax return after a CP13 Notice

If the IRS adjustments don’t address an error that you discovered on your tax return or if you need to correct additional information, you may need to file an amended return. The form to use is Form 1040-X, Amended U.S. Individual Income Tax Return.

When should you file a Form 1040-X?

You should file an amended return if:
  • New information has come to light that would affect your tax liability
  • You realize you made a mistake on your original return that the IRS did not catch
  • You disagree with the IRS adjustments and want to correct your return
Be sure to file the amended return as soon as possible, especially if it affects the amount of tax you owe.
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Frequently asked questions

How can I find out what caused the changes to my tax return?

The IRS CP13 notice will outline the specific miscalculations that were made on your return. Review the notice carefully, and if you need further clarification, you can contact the IRS at the phone number provided in your notice.

What should I do if I disagree with the changes made by the IRS?

If you disagree with the IRS’s adjustments, you should contact them within 60 days of receiving your CP13 notice. You can call the number listed on your notice or respond by mail with a written explanation and supporting documentation.

What happens if I need to make additional corrections to my tax return?

If you discover another mistake on your tax return that the IRS did not address, you will need to file a Form 1040-X, Amended U.S. Individual Income Tax Return. This allows you to correct errors and ensure your tax return is accurate.
Need help understanding other IRS letters and notices? Visit our comprehensive guide to IRS Letters and Notices or search for the document you received in the table below.
IRS Letter or Notice Number
Notice Description
CP01The IRS verified your claim of identity theft and will monitor your account.
CP01HThe IRS received a tax return with a social security number that belongs to a dead person.
CP02HMoney is due on an amended return based on a grant received due to Hurricane Katrina, Rita, or Wilma.
CP03CYou received the First-Time Homebuyer Credit for a house you purchased.
CP04You may be eligible for tax deferment because either you or a spouse served in a combat zone, a qualified contingency operation, or a hazardous duty station during the tax year specified on your notice.
CP08You may be entitled to additional money due to the Additional Child Tax Credit.
CP10Your tax return changed due to a miscalculation, and the refund you wanted to apply to an estimated tax payment has changed.
CP10AYour tax return changed due to a miscalculation of the Earned Income Credit, and the refund you wanted to apply to an estimated tax payment has changed.
CP11You owe money because the IRS amended your return due to a miscalculation.
CP11AYour tax return changed due to a miscalculation of the Earned Income Credit, and the refund you wanted to apply to an estimated tax payment also changed.
CP11MYour tax return changed due to a miscalculation of the Making Work Pay and Government Retiree Credit, and the refund you wanted to apply to an estimated tax payment has changed.
CP12You are due a bigger refund because the IRS corrected one or more mistakes on your tax return.
CP12AThe IRS made changes to correct the Earned Income Credit (EIC) claimed on your tax return.
CP12E or CP12FThe IRS corrected a miscalculation on your return.
CP12MThe IRS made changes to the computation of the Making Work Pay and/or Government Retiree Credits on your return.
CP12RThe IRS made changes to the computation of the Rebate Recovery Credit on your return.
CP13The IRS made changes to your return due to a miscalculation. There is no refund or amount due. Your balance is zero.
CP13AThe IRS made changes to your return due to a miscalculation of the Earned Income Credit. There is no refund or amount due. Your balance is zero.
CP13MThe IRS made changes to your return due to a miscalculation of the Making Work Pay credit or the Government Retiree Credit. There is no refund or amount due. Your balance is zero.
CP13RThe IRS made changes to your return due to a miscalculation of the Recovery Rebate Credit. There is no refund or amount due. Your balance is zero.
CP14You owe money on unpaid taxes.
CP16The IRS made changes to your return due to a miscalculation. The refund you were due was applied to other tax debts.
CP21AYou owe money due to the changes you requested that the IRS make on your tax returns.
CP21BYou are due a refund due to the changes you requested that the IRS make on your tax returns. The money should arrive within 2 to 3 weeks.
CP21CThe IRS made the requested changes to your tax return. You will not receive a refund, and there is no tax due. Your balance is zero.
CP21EAs a result of your recent audit, the IRS made changes to your tax return, and you owe money as a result of those changes.
CP21IThe IRS made changes to your tax return relating to the Individual Retirement Arrangement (IRA) taxes. You owe money due to the changes.
CP22AThe IRS made the changes you requested, and you owe money as a result.
CP22EAs a result of your recent audit, the IRS changed your tax return, and you now owe money.
CP22IThe IRS made changes to your tax return relating to the Individual Retirement Arrangement (IRA) taxes. You owe money due to the changes.
CP23The IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. You owe taxes due to these changes.
CP24The IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. This resulted in an overpayment of estimated taxes.
CP24EThe IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. This resulted in an overpayment of estimated taxes.
CP25The IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. You are not due a refund, nor do you owe any money. Your balance is zero.
CP31You need to update your address because your refund check was returned to the IRS.
CP45The IRS was unable to apply your overpayment to your estimated tax as you requested.
CP49The IRS used all or part of your refund to pay a tax debt.
CP53Your refund check will be sent by mail because the IRS can’t provide your refund through direct deposit.
CP57The bank declined your payment, so the IRS was unable to draft funds from your bank account.
CP71A reminder of the amount you owe in tax, penalty, and interest.
CP71AA reminder of the amount you owe in tax, penalty, and interest.
CP71CA reminder of the amount you owe in tax, penalty, and interest.
CP71DA reminder of the amount you owe in tax, penalty, and interest.
CP88The IRS is holding your refund because you haven't filed one or more tax returns, and it believes you will owe tax.
CP90The IRS is notifying you of its intent to levy certain assets for unpaid taxes. You have the right to dispute the levy in a Collection Due Process hearing.
CP91The IRS will levy up to 15% of your social security benefits for unpaid taxes.
CP120The IRS needs documentation of your tax-exempt status.
CP120AYour organization’s tax-exempt status has been revoked because it failed to file a Form 990 series return for three consecutive years.
CP130You may no longer need to pay the Alternative Minimum Tax (AMT) because your tax return filing requirements changed.
CP152The IRS received your return.
CP153The IRS will send your refund by mail because your direct deposit did not go through.
CP161You have an unpaid balance due to the IRS.
CP166Your monthly payment to the IRS did not go through due to insufficient funds in your bank account.
CP178You may no longer owe excise tax because your tax return filing requirements changed.
CP231You need to update your address because your refund was returned to the IRS.
CP259You did not file the business tax return identified in the notice.
CP259AYou should have filed these forms but did not – Form 990/990-EZ, Return of Organization Exempt From Income Tax, or Form 990-N (e-Postcard).
CP259BThe IRS requires you to file these forms but did not – Form 990-PF, Return of Private Foundation or Section 4947(a)(1) Nonexempt Charitable Trust Treated as a Private Foundation.
CP259CThe IRS believes that you are a private foundation, but did not file the required Form 990-PF, Return of Private Foundation or Section 4947(a)(1) Nonexempt Charitable Trust Treated as a Private Foundation.
CP259DYou must file this form, but you did not – Form 990-T, Exempt Organization Business Income Tax Return.
CP259EYou should have filed this form, but you did not – Form 990-N (e-Postcard) or Form 990/990-EZ, Return of Organization Exempt From Income Tax.
CP259FThe IRS requires you to file this form but did not – Form 5227, Split-Interest Trust Information Return.
CP259GThe IRS requires you to file this form, but you didn’t – Form 1120-POL, U.S. Income Tax Return for Certain Political Organizations.
CP259HAs a tax-exempt political organization, you must file this form, but you did not – Form 990/990-EZ, Return of Organization Exempt From Income Tax.
CP276AYou submitted your tax liability schedule incorrectly. The IRS typically charges a Federal Tax Deposit (FTD) penalty for this but did not this time.
CP276BThe IRS did not receive the correct amount of tax deposits. It normally charges a Federal Tax Deposit (FTD) penalty but did not this time.
CP297The IRS is notifying you of its intent to levy certain assets for unpaid taxes. You have the right to dispute the levy at a Collection Due Process hearing.
CP297AThe IRS has levied your assets for unpaid taxes. You have the right to dispute the levy at a Collection Due Process hearing.
CP298The IRS notifying you of its intent to levy up to 15% of your social security benefits for unpaid taxes.
CP501You have a balance due on one of your tax accounts.
CP503You have an unpaid balance on one of your accounts, and the IRS has not heard from you.
CP504You have an unpaid amount due on your account. If you do not pay immediately, the IRS will levy your state income tax refund to apply it to the amount you owe.
CP504BYou have an unpaid amount due on your account. If you do not pay immediately, the IRS will levy certain property or rights to property to apply it to the amount you owe.
CP521A reminder that you have an installment agreement payment due.
CP523You have defaulted on your payment agreement. Therefore the IRS is terminating the agreement and will levy your assets.
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.
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.
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.
CP2000The income or payment information on file doesn’t match your tax return. The discrepancy may result in an increase or decrease in your tax due.
CP3219AThe IRS has received information that is different from what you reported on your tax return. This may result in an increase or decrease in your tax.
CP3219NThe IRS didn’t receive your tax return, so it calculated your return based on the information received from employers, financial institutions, and others. If you want to challenge the proposed tax, you have 90 days from the date of this notice. If you are outside the country, you have 150 days.
Letter 0012CThe IRS needs additional information to process your tax return.
Letter 0484CThe IRS wants a completed
Letter 0525Updates you on proposed changes after an IRS examination. Any changes are explained and details the refund due or taxes owed.
Letter 531IRS Notice of Deficiency. The information the IRS received about you was different from what you reported on your return.
Letter 0668D(LP 68)The IRS released their levy.
Letter 0549CYour tax bill was paid.
Letter 0681CThe IRS accepted your payment proposal. However, this is not a formal Installment Agreement.
Letter 0757CYou did not adhere to the terms of your Installment Agreement.
Letter LT 11The IRS plans to seize your property or rights to property.
Letter 1058The IRS has not received your payment. It plans to seize your property or rights to property.
Letter 1615 (LT 18)You must respond to the IRS within 10 days of this notice regarding past due tax returns.
Letter 1737 (LT 27)Complete and sign Form 433F, Collection Information Statement.
Letter 1961CYour application for a Direct Debit Installment Agreement was declined. It explains why and what you need to do to qualify.
Letter 1962CYour application for a
Letter 2050 (LT 16)The IRS is trying to collect unpaid taxes from you from returns that have been filed or from returns that have not been filed.
Letter 2257CThe IRS is providing the payoff amount that you requested.
Letter 226-JAn IRS letter to large employers notifying them that they may be liable for an Employer Shared Responsibility Payment (ESRP).
Letter 2271CA request for an Installment Agreement has been approved. It explains the fees and how to qualify for a Low Income Fee Reduction. The letter may also request missing information.
Letter 2272CAn IRS letter explaining why your request to pay the balance due in installments was declined.
Letter 2273CA confirmation letter of your request to pay the balance due in installments. It contained the amount to pay, fees charged, and where to send payment. Instructions on how to apply for the Low Income Fee Reduction included.
Letter 2318CA response to a request to pay taxes due to payroll deductions. It also explains the fees that are charged.
Letter 2357CThe IRS is admitting that it did not send you the balance due notices that it should have.
Letter 2603CThe IRS accepted your installment agreement. The IRS will file a Notice of Federal Tax Lien on your personal property.
Letter 2604CThe IRS has accepted your request for installment payments. This IRS letter provides the monthly payment, the address where to send it, and the fees charged. The letter also provides instructions on how to apply for the Low Income Fee Reduction.
Letter 2761CThe IRS is requesting your combat zone service dates to ensure that it provides you with the special provisions and protection of the combat zone deferment. Copies of military orders or other documentation to support your time served may be requested. Civilians working in support of the Armed Forces may be required to provide a Letter of Authorization or a letter from their employer.
Letter 2789CAn annual reminder notice, as required by law, of the balance due to the IRS. It explains that penalties and interest continue to accrue until the balance is fully paid.
Letter 2840CConfirms your Installment Agreement request and includes the payment amount and due date. This IRS letter explains the fees charged for paying monthly and explains how to apply for the Low Income Fee Reduction (if you qualify).
Letter 3030CProvides an explanation of the tax, penalty, and interest still due on your account.
Letter 3127CA confirmation of your request to make a change to your Installment Agreement. This IRS letter explains the fees for the change. Changes can be to the payment amount or due date, or it can include additional liabilities.
Letter 3174A reminder of taxes due after the IRS has sent a Notice of Intent to Levy.
Letter 3217CThe IRS has accepted your request to pay the balance in installments. This IRS letter provides your payment amount, the due date, and fees charged. The letter also provides instructions on applying for the Low Income Fee Reduction (if you qualify).
Letter 3228 (LT 39)A request to pay the balance due within 10 days using the envelope provided.
Letter 3500The IRS has received your documents, and it needs additional time to review them.
Letter 3572Your Federal Income Tax Return has been selected for examination. The IRS auditor requests that you call to schedule an audit appointment.
Letter 4883CThe IRS received your federal income tax return but needs more information to verify your identity in order to process your tax return accurately.
Letter 4903 (LT 26)You must file your tax returns immediately. The IRS has previously contacted you, but it did not receive a response.
Letter LP 47The IRS is trying to locate the person identified in the letter and is requesting that you provide their new address.
Letter LP 59The IRS has not received a response to the notice of levy it previously sent.
Audit Letter 2205The IRS manages audits either by mail or through an in-person interview to review your records. The interview may be at an IRS office (office audit) or the taxpayer’s home, place of business, or accountant’s office (field audit).
Letter 915You recently underwent an audit, and the IRS informs you that you now owe taxes.

Key takeaways

  • The IRS sends a CP13 notice when they correct errors on your tax return, resulting in a zero balance.
  • Review the notice and compare the IRS adjustments with your original return to ensure accuracy.
  • If you disagree with the changes, respond within 60 days to dispute the IRS’s findings.
  • If you need to make further corrections, file a Form 1040-X, Amended U.S. Individual Income Tax Return.
  • Failure to respond within 60 days can result in the loss of appeal rights and possible referral to an audit.

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IRS CP13 Notice: Your Step-by-Step Response to IRS Adjustments - SuperMoney