Il 1040-2026

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Click ‘Get Form’ to open the IL-1040 in the editor.
Begin by entering your personal information in Step 1. Print or type your Social Security number, name, and address accurately.
In Step 2, report your federal adjusted gross income and any federally tax-exempt interest. Ensure you attach Schedule M if there are other additions.
Proceed to Step 3 where you will list Social Security benefits and any subtractions. Attach necessary federal forms as indicated.
Continue to Steps 4 through 11, filling in exemptions, calculating net income, and determining total tax owed or overpayment based on the provided lines.
Finally, review all entries for accuracy before signing and dating the form in Step 12. Ensure all attachments are included.

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