Idaho State Tax Commission

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We're following national e-standards protocol. We've updated our Letter of Intent (LOI) and have changed the process for providing our MeF specifications, schemas, and test packets to vendors.

This is the process:

  1. We grant the vendor access to Idaho's LOI on the FTA State Exchange System.
  2. The vendor must complete the LOI, and then submit it to the Tax Commission.
  3. We'll review the LOI. If all is in order, we'll grant the vendor access to the FTA State Exchange System for Idaho's MeF specifications, schemas, and test packets.
  4. Income tax substitute forms and related documents are on the State Exchange System, too. If you have any questions, please contact us at


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This information is for general guidance only. Tax laws are complex and change regularly. We can't cover every circumstance in our guides. This guidance may not apply to your situation. Please contact us with any questions. We work to provide current and accurate information. But some information could have technical inaccuracies or typographical errors. If there's a conflict between current tax law and this information, current tax law will govern.