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2023 Individual Income Tax Forms

Form Instructions Description 
IL-1040
Instructions
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Individual Income Tax Return 
IL-1040-X Instructions
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Amended Individual Income Tax Return
IL-1040-ES   2024 Estimated Income Tax Payments for Individuals
Use this form for payments that are due on April 15, 2024, June 17, 2024, September 16, 2024, and January 15, 2025.
IL-1040-V   Payment Voucher for Individual Income Tax 
IL-1040-X-V   Payment Voucher for Amended Individual Income Tax
IL-505-I   Automatic Extension Payment for Individuals Filing Form IL-1040
IL-1310   Statement of Person Claiming Refund Due a Deceased Taxpayer
IL-2210 Instructions
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Computation of Penalties for Individuals
IL-4562 Instructions Special Depreciation
IL-4644 Instructions Gains from Sales of Employer's Securities Received from a Qualified Employee Benefit Plan
IL-4852   Substitute for Unobtainable Form W-2
Schedule 1299-C Instructions
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Income Tax Subtractions & Credits (for individuals)
Schedule 1299-I   Income Tax Credits Information and Worksheets
Schedule 4255 Instructions Recapture of Investment Tax Credits
Schedule CR Instructions
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Credit for Tax Paid to Other State
Schedule F Instructions
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Gains from Sales or Exchanges of Property Acquired Before August 1, 1969
Schedule G Instructions
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Voluntary Charitable Donations
Schedule ICR Instructions
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Illinois Credits
Schedule IL-E/EIC Instructions
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Illinois Exemption and Earned Income Credit
Schedule M Instructions
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Other Additions and Subtractions for Individuals
Schedule NR Instructions
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Nonresident and Part-Year Resident Computation of Illinois Tax 
Schedule IL-WIT
Instructions
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Illinois Income Tax Withheld