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IRS Notice & Letter Library

Every IRS notice and letter explained in plain English — what it means, how much time you have to act, and what to do next. Written by licensed tax professionals.

37

Notices

Plain

English

Critical

Deadlines

All 50

States

Complete Reference

Every IRS Notice Explained

Find your notice below, learn what it means and your deadline, and see the exact next step to protect yourself.

CP10Informational

Statement of Your Tax

A periodic statement showing your tax account activity and current balance. Not a demand — but review it against your records for discrepancies.

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CP14Important

Balance Due — First Notice

The IRS balance-due notice telling you what you owe, plus penalties and interest. Responding on time can keep the balance from growing.

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CP22AImportant

Notice of Change to Your Tax Return

The IRS adjusted your return — often after a recovery rebate or a math error. It shows the corrected tax amount and any balance due or refund.

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CP49Important

Refund Applied to a Debt

Your refund was applied (offset) to a past-due federal or state debt. It explains the offset and how to dispute it if you believe it was wrong.

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CP71AUrgent

Notice of Federal Tax Lien

Notice that the IRS has filed a Federal Tax Lien against your property for unpaid tax. A lien can damage credit and block sales or refinancing.

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CP75Important

Earned Income Credit / Refund Inquiry

The IRS needs verification before releasing a refund involving the Earned Income Tax Credit. You must provide the requested documentation to release your refund.

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CP90Critical

Final Notice of Intent to Levy

The IRS intends to seize (levy) your property or assets in 30 days. Filing a Collection Due Process (CDP) appeal — Form 12153 — is your window to stop it.

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CP91Critical

Final Notice of Intent to Levy

The IRS will seize your state tax refund or other identified property. You have 30 days to request a CDP hearing to halt the levy.

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CP297Critical

Notice of Levy

Notice that the IRS is levying — seizing — your state tax refund. Acting quickly on a CP297 is essential to recover or prevent further collection.

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CP501Important

First Reminder of Balance Due

A reminder that you owe a balance. Paying in full or setting up an agreement now prevents the escalation to a final levy notice.

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CP503Urgent

Second Reminder of Balance Due

A stronger collection reminder. The IRS is preparing to escalate toward a lien and levy — resolving it now avoids more serious action.

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CP504Critical

Final Notice — Intent to Levy

The IRS will seize your state tax refund and other property in 30 days. A timely CDP request (Form 12153) can stop the levy while your case is reviewed.

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CP523Urgent

Default on Installment Agreement

Your installment agreement is in default — a missed payment or unfiled return. Respond immediately to reinstate the plan before a levy is issued.

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CP2000Important

Underreported Income Notice

The IRS believes you underreported income and proposes a change plus penalties. You have 30 days to agree or dispute with supporting evidence.

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Letter 11Urgent

Collection Due Process Hearing Notice

Notice of the IRS's determination after a CDP hearing. You generally have 30 days to petition the U.S. Tax Court to review the determination.

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Letter 12CCritical

Notice of Intent to Levy

The IRS intends to levy your property or wages. A timely CDP appeal is your right to stop collection and propose alternatives.

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Letter 1058Critical

Final Notice of Intent to Levy

The final notice that the IRS will seize your property or rights to property in 30 days. Filing Form 12153 preserves your right to a CDP hearing.

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Letter 1153Urgent

Trust Fund Recovery Penalty — Notice

Notice that the IRS intends to assess the Trust Fund Recovery Penalty against you personally for unpaid withheld trust taxes. You must act within the given deadline.

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Letter 1615Informational

Notice of Contact with Third Parties

Informs you that the IRS may contact third parties to help resolve your account. Understanding your rights under IRC §7602 is important.

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Letter 1862Important

Not Paying in Full — Collection Options

The IRS is informing you of your payment and collection alternatives, including installment agreements and Offers in Compromise.

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Letter 2205Informational

Victims of Tax-Related Identity Theft

Confirms the IRS is handling your identity-theft claim on your account after you reported tax-related identity theft.

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Letter 2357Informational

Identity Theft — Appeal of Offset

The IRS is letting you know that refunds and offsets on your account are being held while it verifies your identity-theft claim.

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Letter 2603CCritical

Notice of Levy on Estimated Federal Payments

Only a portion of the notice is commonly seen; a levy on anticipated federal payments requires prompt action to protect those funds.

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Letter 2645CUrgent

Identity Verification

The IRS needs you to verify your identity before releasing a refund or processing your return. Respond within the deadline to avoid a freeze.

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Letter 2802Informational

Refund Offsets and Federal Debts

Explains that your refund was offset against a federal debt. It includes the amount and the agency that received it.

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Letter 3121Urgent

Intent to Terminate Installment Agreement

The IRS proposes to terminate your installment agreement. Responding with a valid reason for the default can keep the agreement in place.

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Letter 3172Critical

Notice of Federal Tax Lien Filing

The IRS filed a Notice of Federal Tax Lien. You have 30 days to request a CDP hearing to challenge the lien or propose collection alternatives.

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Letter 3219Urgent

Collection Due Process Hearing — Lien

Schedules your Collection Due Process hearing and explains the options available to resolve your underlying tax debt.

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Letter 4883CUrgent

Identity Theft Verification

The IRS believes your return may be affected by identity theft and needs you to call to verify your identity before processing.

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Letter 5071CUrgent

Identity Verification — Possible Identity Theft

The IRS needs you to verify your identity online or by phone before it processes your return. Act within the deadline to release your refund.

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Letter 525Informational

Account Transcript Request

A confirmation that your IRS account transcript has been requested and is being provided.

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Letter 566Important

Balance Due Reminder

A reminder that you have an outstanding balance, including penalties and interest. Payment or an agreement now avoids escalation.

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Letter 668Critical

Notice of Federal Tax Lien / Levy

A levy or lien enforcement notice requiring immediate attention to stop seizure or to pursue a CDP hearing.

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Letter 668-ACritical

Notice of Levy on Bank Accounts & Property

The IRS is levying your bank account or other property. Prompt action is required to release the levy and recover frozen funds.

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Letter 668-DCritical

Notice of Levy — State Tax Refund

The IRS is levying your state tax refund. Requesting relief promptly can prevent the funds from being taken.

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Letter 668-WCritical

Notice of Levy on Wages

The IRS is garnishing your wages — taking a portion of each paycheck until the debt is satisfied. Exemptions protect only a limited amount.

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LT11Critical

Final Notice of Intent to Levy & Right to a Hearing

The most important collection notice. It gives you 30 days to request a Collection Due Process hearing and generally halts levy while the hearing is pending.

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Content updated: August 2026

New Beginning Tax Solutions is a private tax resolution company and is not affiliated with the IRS, the U.S. Department of the Treasury, or any government agency. This page is for general information only and does not constitute tax, legal, or financial advice. Tax rules change frequently — verify current requirements against official IRS sources before relying on anything you read here. Results vary based on individual circumstances.