Illinois Income Tax Forms
Illinois State Income Tax Forms for Tax Year 2021 (Jan. 1 - Dec. 31, 2021) can be e-Filed in conjunction with a IRS Income Tax Return. Details on how to only prepare and print an Illinois 2021 Tax Return.
Below are forms for prior Tax Years starting with 2020. These back taxes forms can no longer be e-Filed. You can complete the forms with the help of eFile.com free tax calculators. Complete the respective Form(s) below, sign, and mail them to the Illinois Department of Taxation. In addition to filing Illinois Forms you might also have to file previous IRS Tax Return Forms.
In addition to filing Illinois Forms you might also have to file previous IRS Tax Return Forms. If you can not find the form listed there use the search button below.
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A list of income tax forms for other states.
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