Idaho State Tax Commission

Idaho State Tax Commission

Software Developers

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


Specifications (current year)

Specifications (prior years)

The information on this site is for general guidance only. Tax laws are complex and change regularly. We can't cover every circumstance in our website guides. We work to provide current and accurate information on our website. But some information could have technical inaccuracies or typographical errors. If there's a conflict between current tax law and the information on our website, current tax law will govern.