Idaho State Tax Commission

Tax Commission News Release

Extended deadline nears for filing income tax returns

BOISE, IDAHO — Oct. 1, 2020 — Time is running out to file your 2019 Idaho state income tax return. The Idaho State Tax Commission says taxpayers who qualified for an automatic extension to file must send in their return and full payment by October 15.

“We expect to receive about 45,000 individual income tax returns in October,” Tax Commission Chairman Tom Harris said. “That’s in addition to the 892,000 returns we’ve received so far this year.” 

Idaho law allows you to avoid a penalty for filing a late return if you have an extension. But you’ll still owe 4% interest on any tax due that wasn’t paid by June 15, the original Idaho income tax due date. 

You can file income tax returns electronically, and you might qualify to file online for free. Visit to learn more. 

You also can pay taxes electronically through The free Quick Pay option lets you make a payment without creating a Taxpayer Access Point (TAP) account.   

If you need tax help:

  • Visit
  • Call (208) 334-7660 in the Boise area or toll free at (800) 972-7660 
  • Visit a Tax Commission office. Go to to find an office near you. 

Update your paycheck withholding

The Tax Commission urges you to review your Idaho and federal W-4s after you’ve filed your 2019 tax return. Ensure that you’re having the right amount of income taxes withheld from your paycheck. Visit to learn more.



Posted 10-01-2020
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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.