How to File an Amended Idaho State Tax Return

"The Gem State"

When Do I Need to File My Idaho Tax Amendment?

Your amended Idaho state return should be filed within 3 years of the filing deadline for the original tax return, or 2 years from the time when tax was paid (whichever is later).

How Do I Fix My Accepted Idaho Tax Return or File an Idaho Tax Amendment?

If there have been changes made to your taxable income, deductions, or tax credits that affect your Idaho state income tax return, then you must file an Idaho tax amendment. You have two options to prepare and file an amended Idaho tax return:

  1. Prepare and file either Form 40 (residents) or Form 43 (nonresident and part-year residents) . Make sure you check off the box indicating that it's an amended return. When you're done, print out the return and mail it to this address: Idaho State Tax Commission, PO Box 56, Boise, ID 83756-0056 OR
  2. You can file your Idaho state tax amendment for either the current or previous Tax Year(s) with the help of an efile TaxPro! Enjoy all the benefits of working with a

    TaxPro, including:

  • You can get answers to your tax questions from a licensed tax professional!
  • Enjoy the peace of mind that your taxes are being prepared and filed by a professional!

The starting price to have an online TaxPro prepare and file your tax amendment is only $79!

Idaho State Tax Amendment Forms (Download, Print Out, Fill Out, and Mail)

If you are resident of the state of Idaho, then fill out Form 40, specifying that the return is amended by checking the appropriate box. If you are a nonresident or part-year resident of Idaho, then fill out Form 43 and check the amended return box. Make sure to attach all the necessary forms (including a 1040X form if you amended your federal tax return as well) to your amended return.

A resident of a state is generally defined as someone who is domiciled in that state and has a permanent residency there that serves as a place of return after trips. A part-year resident is generally defined as someone who resides in a particular state for only part of the year.


Category: Taxes

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