There are a number of IRS letters and notices that are sent as either Examination Letters, Collection Letters, or Notices. See the IRS Letters and Notices Offering an Appeal Opportunity webpage for a brief summary of each of the following letters or notices:

• Letter 11 - Final Notice of Intent to Levy and Notice of Your Right to a Hearing
• Letter 525 - General 30 Day Letter
• Letter 531 - Notice of Deficiency
• Letter 692 - Request for Consideration of Additional Findings
• Letter 915 - Letter to Transmit Examination Report
• Letter 950 - 30 Day Letter-Straight Deficiency or Over-Assessment
• Letter 1058 - Final Notice Reply Within 30 Days
• Letter 1085 - 30-Day Letter Proposed 6020(b) Assessment
• Letter 1153 - Trust Funds Recovery Penalty Letter
• Letter 3016 - IRC Section 6015 Preliminary Determination Letter (30 Day)
• Letter 3391 - 30-Day Non-filer Letter
• Letter 3727 - 30-Day Letter Notifying Taxpayer No Change to Original Report Disallowing EIC Based on Failure to Meet Residency Test for Children Claimed
• Letter 3728 - 30-Day Letter Notifying Taxpayer No Change to Original Report Partially Disallowing EIC Based on Failure to Meet Residency Test for 1 Child
• Letter 3172 - Notice of Federal Tax Lien Filing and Your Rights to a Hearing under IRC 6320

Notices:

• CP 90 - Final Notice of Intent to Levy
• CP 92 - Notice of Levy upon Your State Tax Refund
• CP 242 - Notice of Levy upon Your State Tax Refund
• CP 523 - IMF Installment Agreement Default Notice
• CP 2000

Additional Information

For detailed notice information and assistance, see the Notice Review - General Information FAQ.

Note that any link in the information above is updated each year automatically and will take you to the most recent version of the document at the time it is accessed.