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IRS Letter 12C Guide

Verified Response Guide for Taxpayers

How to respond to IRS LTR12C?

To respond to Letter 12C, send the missing info (like Form 8962 or W-2s) to the address listed. Failure to respond will delay your refund or change your tax amount.

Next Steps to Resolve:

  • Find missing form mentioned
  • Fax or mail docs to IRS
  • Verify health data
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Official Resource: View original notice details on the IRS.gov website.

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Related IRS Guides:

CP11 Guide CP12 Guide CP54B Guide CP14 Guide