IRS letter lookup
Got a letter from the IRS?
LT11Final notice: intent to levy and your right to a hearingVery urgentCP3219ANotice of deficiency (the "90-day letter")Very urgentCP503Second reminder: the balance is still unpaidUrgentCP504Notice of intent to levyUrgentLetter 525Proposed audit changes (the "30-day letter")UrgentCP2000The IRS thinks your return is missing incomeAct on itCP14You have a balance dueAct on itCP501Reminder: you still have a balance dueAct on itCP59The IRS has no record of your returnAct on it5071CVerify your identityAct on itCP162Penalty for a late or incomplete partnership or S-corporation returnAct on itCP2501Your return may not match what was reportedCheck itCP11The IRS corrected your return, and you oweCheck itCP22AChanges to your return: you oweCheck itCP12The IRS corrected your return, and your refund changedGood to knowCP49Your refund was used to pay a tax debtGood to knowCP575Your new EINFor your records
A free tool from Title 26, the US tax code explained. Not tax advice.