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2023 Individual Income Tax Forms

Form Instructions Description 
IL-1040
Instructions (html)
English (pdf)
Español (pdf)
Individual Income Tax Return 
IL-1040-X Instructions (html)
English (pdf)
Español (pdf)
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 (html)
English (pdf)
Español (pdf)
Computation of Penalties for Individuals
IL-4562 English (pdf) Special Depreciation
IL-4644 English (pdf) 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 (html)
English (pdf)
Español (pdf)
Income Tax Subtractions & Credits (for individuals)

Schedule 1299-I

07/10/24 – Updated to include new Quantum Computing Campuses tax credit and to extend expiration dates for credits affected by recently passed legislation.

  Income Tax Credits Information and Worksheets
Schedule 4255 English (pdf) Recapture of Investment Tax Credits
Schedule CR Instructions (html)
English (pdf)
Español (pdf)
Credit for Tax Paid to Other State
Schedule F Instructions (html)
English (pdf)
Español (pdf)
Gains from Sales or Exchanges of Property Acquired Before August 1, 1969
Schedule G Instructions (html)
English (pdf)
Español (pdf)
Voluntary Charitable Donations
Schedule ICR Instructions (html)
English (pdf)
Español (pdf)
Illinois Credits
Schedule IL-E/EIC Instructions (html)
English (pdf)
Español (pdf)
Illinois Exemption and Earned Income Credit
Schedule M Instructions (html)
English (pdf)
Español (pdf)
Other Additions and Subtractions for Individuals
Schedule NR Instructions (html)
English (pdf)
Español (pdf)
Nonresident and Part-Year Resident Computation of Illinois Tax 
Schedule IL-WIT
Instructions (html)
English (pdf)
Español (pdf)
Illinois Income Tax Withheld