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Notice index

Every IRS notice we've decoded

40 CP and Letter notices, grouped by what the IRS is actually doing. Each row links to a per-notice page with the response procedure, deadline source, appeal path, and statute pin — all verified against the official irs.gov detail page.

Category

Urgency

40 notices indexed · IRS.gov primary-source verified

Collection / payment due

14 codes
CP14Date on notice

First IRS bill telling you a balance is owed for a specific tax year. The notice states the amount due and a payment-due date printed at…

Collectionsee notice
CP501Date on notice

First reminder that a balance is still owed after a previous balance-due notice went unanswered.

Collectionsee notice
CP503Date on notice

Second reminder that a balance is still owed and prior notices have gone unanswered.

Collectionsee notice
CP504Time-sensitive

Notice of intent to levy: if the balance is not paid immediately, the IRS may seize state tax refunds and pursue further levy action…

Collectionsee notice
LT11Time-sensitive

Final Notice of Intent to Levy and notification of your right to a Collection Due Process (CDP) hearing. The IRS may seize wages, bank…

Collectionsee notice
CP90Time-sensitive

Notice of intent to levy assets and notification of the right to a Collection Due Process (CDP) hearing.

Collectionsee notice
CP22ADate on notice

Confirmation that requested or system-initiated changes were made to your return and a balance is now due as a result.

Collectionsee notice
CP71Date on notice

Annual reminder that an unpaid balance still exists on a tax account and that interest and penalties continue to accrue. Also addresses…

Collectionsee notice
CP297Time-sensitive

Notice of intent to levy assets for unpaid taxes, with notification of the right to a Collection Due Process (CDP) hearing.

Collectionsee notice
CP297ATime-sensitive

Notice that the IRS has already levied assets for unpaid taxes, with notification of your right to a Collection Due Process (CDP) hearing.

Collectionsee notice
CP297CTime-sensitive

Notice that assets have been levied for unpaid federal taxes, with notification of your right to a Collection Due Process hearing.

Collectionsee notice
CP298Time-sensitive

Notice of intent to levy up to 15% of Social Security benefits for unpaid taxes, with notification of the right to a Collection Due…

Collectionsee notice
CP508CTime-sensitive

Notification that the IRS has certified your seriously delinquent federal tax debt to the U.S. Department of State under IRC §7345,…

Collectionsee notice
CP523Time-sensitive

Notice of intent to terminate an installment agreement and seize assets due to default on the agreement.

Collection30 days

Underreporter (CP2000 family)

4 codes

Examination / audit

4 codes

Math-error correction

3 codes

Identity verification

3 codes

Filing compliance

6 codes

Refund applied / offset

1 code

Informational

5 codes