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Below is a list of common IRS Notices. You can find your notice number on page 1 at the top right. Click a link below that matches the number on your notice to be taken to our corresponding FAQs.

Most Common

CP 2000
CP 12
CP 11
Letter 525
CP 12C

Other Notices


CP 09 CP 22E CP 79
CP 10 CP 23 CP 79A
CP 11A CP 32A CP 90/CP 297
CP 13/CP 13A CP 45 CP 91/CP 298
CP 14 CP 49 CP 161
CP 16 CP 54B/CP 54E/CP 54G/CP 54Q CP 501
CP 22A CP 59 CP 504
CP 21B CP 75/CP 75A/CP 75B CP 504

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