Notice library
Browse the notice directory.
Use the notice number printed on your letter to locate its directory entry. A code is not enough to determine your deadline or situation.
Directory entries are not tax guidance
CP14, CP71C, CP501, CP503, and CP504 have source-checked, reviewed notice explanations. Other codes remain directory entries until their own sources and content have been reviewed.
CP14Reviewed explanationCP21ADirectory entry onlyCP22ADirectory entry onlyCP23Directory entry onlyCP24Directory entry onlyCP49Directory entry onlyCP71CReviewed explanationCP90Directory entry onlyCP91Directory entry onlyCP161Directory entry onlyCP2000Directory entry onlyCP2501Directory entry onlyCP3219ADirectory entry onlyCP501Reviewed explanationCP503Reviewed explanationCP504Reviewed explanationLT11Directory entry onlyLT16Directory entry onlyLT38Directory entry onlyLetter 1058Directory entry only
Categories such as Balance due, Collections, Return discrepancies, Penalties are not assigned until notice records have completed source review.