Illinois Tax Brackets, Rates, Standard Deductions, Forms
Detailed Information about Illinois state income tax brackets and rates, standard deduction information, and tax forms by tax year etc. can be found on this page.
Still need to prepare and file an IL return for a previous Tax Year? Find the Illinois tax forms below. You can complete and sign the forms here on eFile.com before you mail them to the Illinois Department of Taxation. For IRS or Federal back taxes, access the tax forms here.
Below find links to other important Illinois income tax return information and other related features (e.g. tax extension, amendment, etc.).
Illinois Income Tax Returns
Prepare only an IL State Return without an IRS return. Details
File a 2021 Illinois Tax Amendment
Current Illinois Income Tax Forms
Illinois Tax Brackets, Rates explained
IRS Tax Brackets, Rates by Tax Year
Income Tax Brackets, Rates, Income Ranges, and Estimated Taxes Due
Your Illinois Income is based on a flat tax rate. When you prepare your return on eFile.com this is all calculated for you.
Illinois Tax Brackets for Tax Year 2021
2021 Illinois net income is taxed at a 4.95% flat rate.
Illinois Tax Brackets for Tax Year 2020
Your Illinois net income is taxed at a 4.95% flat rate.
Illinois Standard Deductions
Illinois does not have a state standard deduction, nor do they use the federal standard deduction amounts.
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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