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2025 Exempt Organization Income and Replacement Tax Forms

Name Description Description
IL-990-T PDF 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​
 PDF​ ​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 PDF Replacement Tax Investment Credits
Schedule 1299-D PDF Income Tax Credits (for corporations and fiduciaries)
Schedule 1299-I

HTML | PDF

 Income Tax Credits Information and Worksheets
Schedule 4255 HTML | PDF Recapture of Investment Tax Credits