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IRS CP721B Notice: What Is It and How Should You Respond?

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Last updated 10/30/2024 by
SuperMoney Team
Fact checked by
Ante Mazalin
Summary:
The CP721B Notice is issued by the IRS when there’s a need for additional documentation or information related to your tax filings. This typically occurs when discrepancies, missing forms, or verification issues arise that must be addressed before a tax return can be fully processed. In this article, we’ll explore what this notice means, how it affects you, and the best ways to resolve the situation efficiently to avoid delays or penalties.
Receiving a notice from the IRS can be daunting, especially when it relates to a potential issue with your tax filings. The CP721B Notice specifically alerts you that further documentation or verification is required before your tax return can be processed. Ignoring this notice could result in delays or penalties, so it’s important to understand what this notice means and how to respond promptly.

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What is the CP721B notice?

The CP721B Notice is issued by the IRS when there is a need for additional documentation or information to process your tax return. This often happens when there are inconsistencies between the information on your tax return and the records the IRS holds. The notice serves as a formal request for you to submit specific details or forms needed to finalize your return.
Some common reasons for receiving a CP721B Notice include:
  • Discrepancies between your tax return and IRS records.
  • Failure to include essential forms like W-2 or 1099.
  • Issues with verifying your identity or address.
  • Missing signatures or incomplete sections on your tax return.
The CP721B Notice outlines exactly what documents or information you need to submit, along with instructions on how to provide them to the IRS. Submitting the required information promptly ensures that your tax return can be processed accurately, helping you avoid future audits or issues.
Struggling with IRS notices? If you’ve received an IRS letter and aren’t sure how to handle it, you might want to explore professional tax relief options. Optima Tax Relief has helped thousands of people resolve their tax issues and get back on track with the IRS. Learn more about how they can assist you with your situation.

How the CP721B notice affects you

Receiving a CP721B Notice means that your tax return cannot proceed until the IRS receives the necessary documentation. This delay can affect the timeline for any refund you may be expecting, and if you owe taxes, it can lead to penalties or interest if the issue isn’t resolved within a specified timeframe.
Ignoring this notice can lead to significant consequences, such as:
  • Delayed tax return processing.
  • Refund delays, which could take months.
  • Potential penalties for underpayment or discrepancies in reported income.
To avoid these problems, it’s crucial to act immediately upon receiving the CP721B Notice. Carefully review the notice, gather the requested documents, and submit them following the instructions provided. This proactive approach will help resolve the issue quickly and avoid further complications.

Pro tip

Always double-check the instructions on your CP721B Notice to ensure you are providing the correct documents and that your response is complete. Missing a required form or forgetting a signature can delay the process and cause additional headaches.

What should you do when you receive a CP721B notice?

When you receive a CP721B Notice, it’s essential to act promptly to avoid delays and penalties. Here’s a step-by-step guide to resolving the issue:
  • Review the notice carefully: Ensure you understand what documents or information the IRS is asking for.
  • Check your records: Verify the information on your tax return and identify any discrepancies or missing forms.
  • Gather the required documentation: This could include additional forms, corrected information, or identity verification documents.
  • Submit the documents: Follow the instructions in the notice to send your documents, either by mail or electronically via the IRS secure portal.
  • Track your submission: Keep copies of the documents you send to the IRS and use certified mail or a tracking service to ensure your response is received.
Timely and complete responses help prevent delays and ensure your tax return is processed efficiently.

Pro tip

Use certified mail with a return receipt when sending documents to the IRS. This provides proof that your submission was received and can help if any disputes arise later.

How to respond to the CP721B notice

Steps to take when responding to a CP721B notice

After reviewing the CP721B Notice, follow these steps to respond effectively:
  1. Identify the requested documents: The notice will specify which documents or forms are missing or need correction.
  2. Submit any necessary corrections: If there is an error on your tax return, you may need to file an amended return or submit corrected forms, such as a revised W-2 or 1099.
  3. Send your response: Depending on the instructions, you may be able to mail the documents or submit them electronically. Be sure to include all required signatures and dates.
  4. Contact the IRS if needed: If you’re unsure about any part of the notice, don’t hesitate to contact the IRS or consult a tax professional.

Other ways to handle a CP721B notice

If your CP721B Notice involves identity verification or suspected identity theft, you may need to take extra steps to protect your personal information. The IRS provides an Identity Protection PIN (IP PIN) program, which issues you a unique PIN for filing your tax returns, helping to safeguard against identity theft.
In many cases, the IRS allows documents to be submitted online via a secure portal, which can expedite the process. You can also visit a local IRS office for in-person assistance or call the IRS for help with urgent concerns.

Further support options for addressing a CP721B notice

If you’re unsure how to proceed after receiving a CP721B Notice, consider the following support options:
  • Consult a tax professional: A Certified Public Accountant (CPA) or tax attorney can offer expert advice, especially if the notice involves complex tax issues or potential penalties.
  • Visit the IRS website: The IRS website offers a variety of resources, including FAQs, forms, and guides to help you understand the notice and how to resolve it.
  • Taxpayer Advocate Service: If you’re experiencing difficulties resolving the issue, the IRS’s Taxpayer Advocate Service can provide free assistance.

Pro tip

If you’ve experienced identity theft, consider enrolling in the IRS’s Identity Protection PIN (IP PIN) program to add an extra layer of security to your future tax filings.

Potential penalties or next steps if you don’t respond

Failure to respond to a CP721B Notice can have serious consequences. The IRS relies on the requested documentation to verify the accuracy of your tax return and determine whether you are eligible for any refunds or deductions. Ignoring the notice could result in the following penalties:
  • Penalties for underpayment: If the IRS determines that you owe additional taxes, you may be charged interest and penalties for the unpaid balance.
  • Refund delays: Any refund you’re due could be delayed indefinitely until the issue is resolved.
  • Enforcement actions: In extreme cases, the IRS may take action such as levying fines or garnishing wages if they suspect unpaid taxes or fraud.
Responding promptly helps you avoid these consequences and keeps your tax return processing on track.

What potential outcomes are possible?

Once you respond to the CP721B Notice, there are several possible outcomes, depending on the nature of the issue:
  • Providing sufficient documentation: If your documentation is complete, the IRS will review it and process your tax return as usual, including any refunds or credits you’re entitled to.
  • Request for further details: In some cases, the IRS may need more information or additional forms to resolve discrepancies or issues.
  • Identity theft protection: If your notice involved identity verification, the IRS may enroll you in their Identity Protection PIN program to safeguard your account from future fraud.
Responding promptly and accurately to the CP721B Notice is crucial for a smooth resolution. The sooner you provide the requested documentation, the faster the IRS can process your tax return.
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Frequently asked questions

What is the difference between CP721B and other IRS notices?

The CP721B Notice specifically requests additional documentation or information needed to process your tax return. Other IRS notices, such as CP2000 or CP501, may be related to proposed adjustments to your tax return or unpaid balances. Each notice serves a different purpose, but they all require timely attention to avoid penalties or delays in tax processing.

How long do I have to respond to a CP721B notice?

The CP721B Notice will specify a deadline for submitting the requested documentation, typically within 30 days of the notice date. It is essential to respond within this timeframe to avoid delays in processing your return and to prevent possible penalties or enforcement actions.

Can I request an extension to provide the necessary documents?

If you are unable to gather the required documents by the deadline stated in the CP721B Notice, you can contact the IRS to request an extension. While extensions may be granted in some cases, it’s best to act quickly and provide any information as soon as possible to avoid complications.

What happens after I submit the requested documents?

Once the IRS receives your documents, they will review your submission. If everything is in order, they will proceed with processing your tax return, which may include issuing your refund. If further clarification or corrections are needed, the IRS may send another notice or request additional documentation.

Can I avoid receiving a CP721B notice in the future?

While there’s no guaranteed way to avoid receiving a CP721B Notice, you can reduce the likelihood by ensuring your tax return is complete and accurate before filing. Double-check all forms, ensure you’ve included necessary documentation such as W-2s or 1099s, and verify that all sections are filled out correctly, including signatures and identification information.
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 CP721B Notice is issued when the IRS needs additional information or documentation to process your tax return.
  • Acting promptly and providing the correct documents will help prevent delays and potential penalties.
  • Review the notice carefully, gather the required documentation, and submit it as instructed to resolve the issue efficiently.
  • Ignoring the notice can result in refund delays, penalties, and even enforcement actions by the IRS.

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