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News – Tuesday, December 23, 2025
Informational Bulletin FY 2026-15, What’s New for Illinois Income Taxes
Changes for 2025 Illinois Income Tax forms and schedules for individuals and businesses, 2026 Withholding Income Tax forms and schedules, and tax preparers and software developers.
See Informational Bulletin FY 2026-15, What's New for Illinois Income Taxes, for more information.