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IRS Notice Library

Understanding your IRS notice is the first step to resolution. Here are the most common notices we see and how we handle them.

Notice CP2000 - Unreported Income

Income Discrepancy

critical

The IRS receives copies of every W-2, 1099, and income statement filed under your Social Security number. When the numbe...

Response deadline: 30 days

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Notice CP1403 - Requested Information

Document Request

info

A CP1403 requests specific documents or information to verify credits claimed on your tax return. The IRS wants to confi...

Response deadline: 30 days

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Notice LT11 - Final Notice Before Levy

Final Notice

critical

An LT11 — Notice of Intent to Levy and Notice of Your Right to a Hearing — is the final letter in the IRS collection seq...

Response deadline: 30 days

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Notice CP504 - Intent to Levy

Collection Process

critical

A CP504 — Notice of Intent to Levy — means your unpaid tax account has been referred to the IRS Automated Collection Sys...

Response deadline: 30 days

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Notice CP14 - Tax Bill

Tax Bill

medium

A CP14 is the IRS's first formal bill — it tells you exactly how much you owe, broken down into three numbers: the origi...

Response deadline: 21 days

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Notice CP501 - Balance Due

Balance Due

medium

A CP501 is a reminder notice — it tells you that you still have an unpaid balance from a prior tax bill (usually a CP14)...

Response deadline: 10 days

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Notice CP502 - Reminder of Balance Due

Balance Due Reminder

medium

A CP502 is the second reminder notice for an unpaid tax balance. It follows the CP14 (initial bill) and CP501 (first rem...

Response deadline: 10 days

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Notice CP503 - Second Reminder

Lien Warning

critical

A CP503 is the second reminder in the IRS collection sequence. It arrives after a CP14 (initial bill) and a CP501 (first...

Response deadline: 10 days

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Notice CP523 - Installment Agreement Default

Agreement Default

critical

A CP523 means you have defaulted on your installment agreement. The IRS cancels your payment plan — usually because you ...

Response deadline: 30 days

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Notice CP259 - Estimated Tax Penalty

Penalty Notice

medium

A CP259 assesses an estimated tax penalty. The IRS is charging you a penalty for not paying enough tax during the year t...

Response deadline: 60 days

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Notice CP22E - Examined Return

Examination Results

critical

A CP22E is issued after the IRS examines your return and makes changes that result in a balance due. Unlike a CP2000 (wh...

Response deadline: 30 days

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Notice CP2000A - Underreported Income

Income Matching

critical

A CP2000A is a variant of the CP2000 that specifically addresses underreported income. The IRS's automated matching syst...

Response deadline: 30 days

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Notice LT39 - Payment Plan Request

Plan Acknowledgment

info

An LT39 is a payment plan request notice. It informs you that the IRS has received your request for an installment agree...

Response deadline: N/A

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Notice CP49 - Overpayment Applied

Overpayment Applied

info

A CP49 is an overpayment applied notice. The IRS applied your tax refund to a past-due amount you owe — such as a prior-...

Response deadline: N/A

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Notice CP91 - Levy on Social Security

Social Security Levy

critical

A CP91 notifies you that the IRS intends to levy your Social Security benefits through the Federal Payment Levy Program ...

Response deadline: 30 days

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Notice CP90 - Final Notice of Levy

Final Levy Warning

critical

A CP90 is a Final Notice of Intent to Levy. It informs you that the IRS intends to seize your property or assets to sati...

Response deadline: 30 days

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Notice CP161 - Notice of Federal Tax Lien

Tax Lien Filed

critical

A CP161 is a Notice of Federal Tax Lien filing. It informs you that the IRS has filed a public lien against your propert...

Response deadline: N/A

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Notice CP297 - Notice of Levy Right

Hearing Rights

medium

A CP297 notifies you of your right to a hearing after the IRS has issued a notice of levy. It explains your Collection D...

Response deadline: 30 days

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Notice CP71C - Estimated Tax Penalty

Estimated Tax Penalty

medium

A CP71C is an annual reminder that you have an unpaid tax balance. The IRS sends this each year to remind you of the out...

Response deadline: 60 days

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Notice CP2100 - Backup Withholding

Backup Withholding

medium

A CP2100 is a backup withholding notice sent to payers — businesses or individuals who file 1099s. It informs the recipi...

Response deadline: N/A

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Notice CP01 - Identity Verification

Identity Verification

critical

A CP01 confirms that the IRS has verified an identity theft claim on your account. It informs you that the IRS has place...

Response deadline: 30 days

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Notice CP01A - IP PIN

IP PIN

info

A CP01A contains your newly generated 6-digit Identity Protection Personal Identification Number (IP PIN). The IRS issue...

Response deadline: N/A

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Notice CP80 - Unallocated Payment

Payment Issue

medium

A CP80 notifies you that the IRS has received a tax payment or credit for your account, but has no record of receiving y...

Response deadline: 60 days

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Notice CP24 - Estimated Tax Overpayment

Estimated Tax Credit

info

A CP24 is an estimated tax overpayment notice. The IRS found that you overpaid your estimated taxes and is adjusting you...

Response deadline: N/A

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Notice CP40 - Refund Applied to Debt

Refund Offset

medium

A CP40 notifies you that the IRS applied your tax refund to a past-due federal debt — such as a prior-year tax balance, ...

Response deadline: N/A

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Notice CP53 - Direct Deposit Issue

Direct Deposit Issue

info

A CP53 notifies you that there was an issue with your direct deposit refund. The IRS was unable to deposit your refund i...

Response deadline: N/A

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Notice CP59 - No Return Filed

Unfiled Return

critical

A CP59 informs you that the IRS has no record of receiving your tax return for one or more tax years. The IRS believes y...

Response deadline: 30 days

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Notice CP166 - Health Coverage Requirement

Health Coverage

medium

A CP166 is a notice regarding health coverage requirements. It informs you of a potential Shared Responsibility Payment ...

Response deadline: 30 days

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Notice CP182 - Innocent Spouse Relief

Innocent Spouse

medium

A CP182 notifies you that the IRS has received your request for Innocent Spouse Relief under IRC § 6015 and is processin...

Response deadline: 30 days

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Notice CP298 - Tax Lien Release

Lien Release

info

A CP298 notifies you that a Notice of Federal Tax Lien has been released. The IRS has removed the lien because the tax d...

Response deadline: N/A

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Notice CP299 - Tax Lien Subordination

Lien Subordination

info

A CP299 notifies you that the IRS has subordinated a Notice of Federal Tax Lien. Subordination means the IRS has agreed ...

Response deadline: N/A

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Notice CP508 - Passport Certification

Passport Denial

critical

A CP508 notifies you that the IRS has certified your seriously delinquent tax debt to the State Department. This certifi...

Response deadline: 30 days

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Notice CP11 - Return Changed

Return Adjustment

medium

A CP11 is a math error notice that results in a balance due. The IRS found a calculation error on your return that chang...

Response deadline: 60 days

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Notice CP12 - Overpayment Refund

Refund Due

info

A CP12 is a math error notice that results in a refund adjustment. The IRS found a calculation error on your return, cor...

Response deadline: N/A

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Notice CP13 - No Change

No Change

info

A CP13 is a math error notice where the IRS found a calculation error on your return but the correction does not change ...

Response deadline: N/A

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Notice CP23 - Estimated Tax Mismatch

Estimated Tax Mismatch

medium

A CP23 notifies you that the IRS found a discrepancy between the estimated tax payments you claimed on your return and t...

Response deadline: 30 days

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Notice CP256V - Estimated Tax Payment

Payment Received

info

A CP256V is an estimated tax payment reminder. The IRS is reminding you that you may need to make estimated tax payments...

Response deadline: N/A

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Notice CP321 - Refund Check

Refund Check

info

A CP321 notifies you that your refund check has been processed and is being mailed. This is a routine confirmation that ...

Response deadline: N/A

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Notice CP322 - Refund Direct Deposit

Direct Deposit

info

A CP322 notifies you that your refund has been processed and the direct deposit has been initiated. The IRS has approved...

Response deadline: N/A

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