Amends the Illinois Housing Development Act and the Illinois Income Tax Act. Provides that the amount of credits awarded under the affordable housing tax donation program is limited to $41,831,227 in State fiscal year 2027 and shall increase by 10% each fiscal year thereafter (currently, $32,850,352 in State fiscal years 2022 and 2023 increased by 5% each fiscal year thereafter). Provides that the affordable housing donation income tax credit applies through the taxable year ending on December 31, 2036 (currently, December 31, 2026). Effective immediately.