Illinois income tax: Fill out & sign online

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Click ‘Get Form’ to open the Illinois Form IL-1040 in the editor.
Begin by entering your personal information. Fill in your Social Security number and that of your spouse, followed by your names and mailing address. Ensure accuracy as this information is crucial for processing.
Staple your W-2 and 1099 forms as instructed. Then, proceed to report your income by filling out Lines 1 through 4, ensuring you include all necessary figures from your federal return.
In Step 4, calculate exemptions based on the number of dependents and age criteria. This will help determine your exemption allowance.
Continue through Steps 5 to 12, carefully following instructions for calculating taxes owed or refunds due. Make sure to attach any required schedules as indicated.
Finally, sign the form in Step 14 and ensure all details are correct before submitting it electronically or via mail.

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illinois tax form

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