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2023 Exempt Organization Income and Replacement Tax Forms

Name
 Description
IL-990-T Instructions Exempt Organization Income and Replacement Tax Return
IL-990-T-V  

Payment Voucher for Exempt Organization Income and Replacement Tax

To make a return or extension payment, use this voucher and Appendix B of Form IL-990-T Instructions.
To make an estimated payment, use this voucher and Appendix A of Form IL-990-T Instructions.

Important: Ensure the proper month and year of the filing period you wish to make a payment for is entered on the "Tax year ending" lines of the voucher.
IL-990-T-X​
 Instructions​ ​Amended Exempt Organization Income and Replacement Tax Return
IL-990-T-X-V  

Payment Voucher for Amended Exempt Organization Income and Replacement Tax

Important: Ensure the proper month and year of the filing period you wish to make a payment for is entered on the "Tax year ending" lines of the voucher.
IL-477 Instructions Replacement Tax Investment Credits
Schedule 1299-D

Instructions

07/10/24 – Updated to include new Quantum Computing Campuses tax credit.

 Income Tax Credits (for corporations and fiduciaries)

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 Instructions Recapture of Investment Tax Credits