Idaho State Tax Commission

Idaho State Tax Commission

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2018 individual income tax forms are available on our website. We expect to post 2018 business income tax forms by January 18.

Did you receive a Form 1099-G from us? Read more.

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Latest News

01-15-2019 Withholding guide updated with new Idaho W-4

01-14-2019 Tax law changes you need to know

01-08-2019 New Idaho W-4 helps taxpayers estimate paycheck withholding

01-03-2019 Decisions posted to the website in December 2018

12-31-2018 Your W-4 is way off, and you need to fix it now

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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.