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What to do About IRS Notice CP45

Silas Bamigbola avatar image
Last updated 10/29/2024 by
Silas Bamigbola
Fact checked by
Ante Mazalin
Summary:
IRS Notice CP45 informs a taxpayer that the IRS was unable to apply an overpayment from one tax year to their estimated tax for the following tax year as requested. This notice typically arises due to a delay or error in the IRS’s processing of the return with the overpayment, or an issue with the taxpayer’s calculations. Taxpayers who receive this notice must review it carefully to determine whether additional action is required. Understanding the reasons behind CP45 and following the appropriate steps can help avoid future penalties and delays in tax payments.
Receiving a notice from the IRS can be a cause for concern, especially when it pertains to an overpayment or tax credit you were counting on. One such notice, IRS Notice CP45, signals that the IRS encountered an issue while trying to apply an overpayment from one tax year to your estimated taxes for the next. While this situation can be frustrating, understanding the reasons behind the notice and the steps you should take can help you avoid penalties or further delays. This article will break down the CP45 notice, explain why you received it, and guide you on what to do next.
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What is IRS Notice CP45?

IRS Notice CP45 is an official correspondence from the Internal Revenue Service (IRS) that notifies taxpayers when their overpayment from one tax year cannot be applied to the following year’s estimated taxes as requested. When filing a tax return, taxpayers can choose to apply an overpayment to future taxes instead of receiving a refund. However, if there is an error in the filing or if the IRS has difficulty processing the return, the overpayment may not be applied, triggering a CP45 notice.
In some cases, the IRS may identify discrepancies or missing information, causing a delay in applying the overpayment. Additionally, if the IRS adjusts your return due to a miscalculation, the overpayment might be reduced, leaving insufficient funds to cover your estimated taxes for the next year. As a result, you may need to adjust your payments to avoid penalties for underpayment.

Pro Tip

Set up IRS account alerts online to get real-time notifications on any changes to your tax return or account. This helps you stay updated on adjustments and due dates.

What does IRS Notice CP45 mean for you?

There are several reasons you might have received IRS Notice CP45. These reasons generally relate to how your tax return was processed, the timing of your filing, or issues with your overpayment. Common causes include:

1. IRS processing delays

The IRS may send CP45 if they experience delays processing your return. This can occur during busy tax seasons or when additional information is needed to finalize your return. If the overpayment cannot be applied by the time your estimated taxes are due, this notice is sent to inform you that adjustments are needed.

2. Errors in calculations

Mistakes in your tax return, such as miscalculations of your tax liability or overpayment, can also trigger this notice. The IRS will correct the error, which may reduce or eliminate the overpayment, leaving insufficient funds to apply to your estimated taxes.

3. Adjustments to your return

If the IRS makes adjustments to your tax return after you submit it, these changes may affect the overpayment amount. For example, if deductions or credits are altered, the overpayment may be reduced, or the IRS may determine that no overpayment exists.

4. Carryover not applied

Sometimes, even when your tax return is correct, the IRS may have difficulty carrying over your overpayment to the following tax year due to a processing issue or error on their part. In these cases, the CP45 notice will be sent to notify you of the situation.

Pro Tip

Consider using electronic payment methods to ensure timely and accurate estimated tax payments, which reduces the chances of underpayment penalties or errors.

Next steps after receiving IRS Notice CP45

When you receive IRS Notice CP45, it is important to review the notice carefully and take appropriate action. Here’s what you should do:

1. Verify the notice

First, ensure that the information in the CP45 notice matches your tax return. Double-check the overpayment amount, and review your return to confirm that there are no errors in your calculations.

2. Request a tax transcript

You can request a copy of your IRS tax account transcript to verify whether the overpayment was applied after processing. The transcript will show all transactions on your account, including payments, adjustments, and overpayment applications.

3. Adjust your estimated tax payments

If the overpayment was not applied as requested, you may need to adjust your estimated tax payments for the current year. This can help prevent underpayment penalties and interest from accruing on any unpaid taxes.

4. Contact the IRS

If you have questions or believe there was an error, contact the IRS using the toll-free number listed on the CP45 notice. Their representatives can provide additional clarification and help resolve any discrepancies.

Pro Tip

Keep a detailed record of your payments and overpayments to make it easier to resolve discrepancies if you receive a CP45 notice.

How to prevent IRS Notice CP45 in the future

While receiving a CP45 notice can be inconvenient, there are steps you can take to avoid similar situations in the future:

1. File your taxes early

Filing your taxes as early as possible can help ensure that the IRS processes your return before estimated tax payments are due. This reduces the likelihood of delays that could result in a CP45 notice.

2. Double-check your return for accuracy

Review your tax return thoroughly before submitting it to avoid errors in calculations or information. Simple mistakes, like incorrect amounts or miscalculations, can prevent the IRS from applying your overpayment correctly.

3. Monitor your IRS account

After submitting your tax return, monitor your IRS account online to check the status of your overpayment and ensure it is applied as expected. If any issues arise, you can address them promptly.

4. Consider professional tax assistance

Working with a tax professional can help you avoid errors and ensure your tax returns are filed accurately. A professional can also help you navigate any complications that arise with your overpayment or estimated tax payments.
Looking for the best way to reduce your tax burden? We’ve compiled a list of the Best Tax Relief Companiesto help you navigate tax challenges and save money. Click here to discover trusted experts who can assist you with tax resolution, IRS negotiations, and more!

Frequently asked questions

What is IRS Notice CP45 and what does it mean for my taxes?

IRS Notice CP45 is a notification sent to taxpayers when the IRS is unable to apply an overpayment from one tax year to their estimated taxes for the next tax year as requested. This often occurs due to processing delays, calculation errors, or adjustments made by the IRS. If you receive this notice, it means the overpayment you expected to carry over may not have been applied, which could affect your estimated tax payments and potentially lead to penalties if not addressed.

How can I check if my overpayment was applied correctly?

You can check whether your overpayment was applied by requesting a tax account transcript from the IRS. This transcript will show the history of your tax payments, including overpayments and any adjustments made. If the transcript shows that the overpayment was applied, you may not need to take further action. However, if the overpayment was not applied, you may need to adjust your estimated tax payments for the current year.

What should I do if I cannot pay my estimated taxes due to the overpayment not being applied?

If your overpayment was not applied and you are unable to meet your estimated tax obligations, it is crucial to adjust your payments as soon as possible. You may need to make additional estimated payments to avoid underpayment penalties and interest. You can also contact the IRS for assistance or consult with a tax professional to ensure you are on track with your payments.

Will receiving a CP45 notice affect my tax return processing or refund?

Receiving a CP45 notice does not directly delay the processing of your current tax return or any refund you are owed. However, if the overpayment was intended to cover future estimated taxes and was not applied, you may need to make adjustments to your estimated payments for the current tax year. If this goes unaddressed, it could lead to penalties or interest charges.

How do I avoid receiving IRS Notice CP45 in the future?

To avoid receiving CP45 in the future, ensure that your tax return is filed accurately, with no calculation errors, and file early to avoid processing delays. Double-check that your overpayment is correctly applied when filing, and monitor your IRS account online to confirm the application of any overpayments. Seeking the assistance of a tax professional can also help you avoid issues that may trigger a CP45 notice.
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

  • IRS Notice CP45 is issued when the IRS cannot apply an overpayment to your estimated taxes for the next year.
  • Common reasons include IRS processing delays, errors in calculations, or adjustments to your tax return.
  • After receiving CP45, verify the notice, check your tax account, and adjust estimated tax payments if necessary.
  • Responding promptly can help you avoid penalties for underpayment and keep your tax filings on track.

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