IRS Letters & TaX Notice Help

Gregg The Tax Guy helps taxpayers in Olathe, Johnson County, and the Kansas City area understand IRS and Kansas tax notices, refund letters, identity verification requests, and tax adjustment notices.

 

Here are some of the most common IRS notices and letters that taxpayers receive, along with official IRS explanations and resources:
 

• CP2000 – Underreported Income Notice
  Usually issued when IRS records from W-2s, 1099s, brokerage statements, or retirement distributions do not match the tax return.

• CP5071 / 5071C – Identity Verification Letter
  Sent when the IRS needs to verify your identity before processing a return or refund.

• Verify Your Return (5071C / 5447C)
  Official IRS identity verification portal and instructions.

• Letter 4464C – Return Under Review
  Commonly issued when the IRS places a temporary hold on a refund while reviewing income, withholding, or credits.

• CP05 – Refund Review Notice
  Indicates the IRS is reviewing the return before releasing the refund.

• LT11 / Letter 1058 – Final Notice Before Levy
  Serious collection notice warning of possible wage garnishment or bank levy.

• CP14 – Balance Due Notice
  One of the most common IRS letters — indicates taxes, penalties, or interest are owed.

• CP504 – Intent to Levy Notice
  Warns that the IRS may seize state refunds or pursue collections if payment is not made.

• Letter 12C – Missing Information Request
  Sent when the IRS needs additional documents or clarification to process a return.

• CP75 – Earned Income Credit Audit Notice
  Requests proof of dependents, residency, or eligibility for certain credits.

• IRS Notice & Letter Search Tool
  Official IRS lookup page where taxpayers can search notices by notice number.

• CP2000 – Underreported Income Notice

• CP05 – Refund Review Notice

• CP05A – Refund Review Supporting Documents Request

• CP06 – Recovery Rebate Credit Adjustment

• CP11 – IRS Made Changes Resulting in Balance Due

• CP12 – IRS Changed Your Refund Amount

• CP13 – Refund Applied to Tax Debt

• CP14 – Balance Due Notice

• CP21A – Changes Made to Your Return

• CP22A – Balance Due After IRS Changes

• CP23 – Estimated Tax Payment Adjustment

• CP24 – IRS Offset Refund Notice

• CP49 – Refund Applied to Another Debt

• CP501 – First Balance Due Reminder

• CP503 – Second Balance Due Reminder

• CP504 – Intent to Levy Notice

• CP75 – Earned Income Credit Audit Notice

• CP80 – IRS Has Credits But No Return

• CP87A – Possible Identity Theft Notice

• CP3219A – Statutory Notice of Deficiency

• Letter 12C – IRS Needs Additional Information

• Letter 4464C – Return Under Review

• Letter 5071C – Identity Verification Required

• Letter 4883C – IRS Identity Verification

• Letter 525 – Audit Changes Proposed

• LT11 / Letter 1058 – Final Notice Before Levy

• IRS Notices & Letters Search Tool

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