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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →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
Learn More →No Menus. Just Answers.
Type your question, or tap the mic and just say it — I'm on around the clock and I never put you on hold. The more you tell me, the faster I get you a real answer. No forms to wrestle, no phone tag.
The fastest way to reach us is the chat above.
This form is for prospective clients only. No solicitation. Existing clients — please use the chat or call us directly.