Il 1040-2026

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The document is the 2017 Form IL-1040-X, an Amended Individual Income Tax Return for residents of Illinois. It provides instructions for taxpayers to correct their previously filed income tax returns by detailing personal information, reasons for amendments, and adjustments to income and tax calculations. The form requires attachments of relevant federal forms and documentation to support changes made.

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Click ‘Get Form’ to open the IL-1040 in the editor.
Begin by entering your personal information in Step 1. Fill in your Social Security number, name, and address accurately. If there are any changes from your previous return, check the appropriate box.
In Step 2, report your income. Enter your federal adjusted gross income and any tax-exempt interest. Ensure you attach Schedule M if there are other additions.
Continue through the form, completing each section methodically. For example, in Step 5, calculate your exemptions based on your filing status and age.
In Steps 8 through 12, detail your tax calculations and any payments made. Be sure to review for accuracy before submission.

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Versions	Form popularity	Fillable & printable
2023	4.6 Satisfied (54 Votes)
2022	4.7 Satisfied (41 Votes)
2021	4.8 Satisfied (48 Votes)
2020	4.2 Satisfied (70 Votes)
2019	4 Satisfied (29 Votes)
2018	4.3 Satisfied (120 Votes)
2017	4.4 Satisfied (121 Votes)
2016	4.4 Satisfied (599 Votes)
2014	4.4 Satisfied (58 Votes)
2012	4 Satisfied (26 Votes)
2011	4 Satisfied (32 Votes)