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Commonly Asked Questions about Illinois tax Business Forms

File Form IL-1040, Individual Income Tax Return, on MyTax Illinois. File Form IL-1040, Individual Income Tax Return, on MyTax Illinois illinois.gov programs mytax illinois.gov programs mytax
If the form or publication you need is not available here, you can downloaded it from our Forms area or Publications area. If you have any questions, email us at REV.OrderTaxForms@illinois.gov or call us at 1 800 732-8866 or 217 782-3336 (TDD-telecommunication device for the deaf 1 800 544-5304). Submit Request for Mailed Forms or Publications -Forms Ordering illinois.gov forms ordering illinois.gov forms ordering
Form REG-1 Please allow 6 to 8 weeks for processing if you complete and mail Form REG-1 to us. If applicable, you will be issued a Certificate of Registration or License and taxpayer ID (i.e., your tax number). Business Registration - Illinois Department of Revenue illinois.gov businesses registration illinois.gov businesses registration
Illinois flat corporate income tax rate tallies 9.5% and includes a 7% business income tax rate and a 2.5% Personal Property Replacement Tax for corporations.
Small Business Corporation Replacement Tax Return This form is for tax years ending on or after December 31, 2023, and before December 31, 2024. For all other situations, see instructions to determine the correct form to use.
If you have created a MyTax Illinois account, login to your account to view and print your return. If you filed your IL-1040 without creating a MyTax Illinois account, go to the MyTax Illinois home screen. Click the Retrieve a return, application, or payment button.
Downloading from IRS Forms Publications page. Picking up copies at an IRS Taxpayer Assistance Center. Going to the IRS Small Business and Self-Employed Tax Center page. Requesting copies by phone 800-TAX-FORM (800-829-3676).
How to get Forms Download Forms. Submit a request to have forms or publications mailed to you. You can also request certain forms and publications by calling our 24-hour forms order hotline at 1 800 356-6302.
Income tax forms Sole business owners must also submit a Schedule C (Form 1040 or Form 1040-SR), Profit or Loss from Business. Additionally, partnerships must file an information return (Form 1065, U.S. Return of Partnership Income, and Form 965-A, Individual Report of Net 965 Tax Liability).
Personal computer users may download forms and publications from the IRS Web site at .irs.gov/formspubs/index.html. This site also has links to state tax forms and to forms that you can fill in online and then print.