INCOME TAX-DUE DATES House SponsorsRep. Charles Meier 1/13/2021HouseSession Sine Die 35 ILCS 5/506.1 new Amends the Illinois Income Tax Act. Provides that, if a disaster is declared by proclamation of the Governor for all counties in the State due to a public health emergency, the income tax filing and tax payment deadline required by the State of Illinois shall be extended until 90 days after the end of the Governor's declaration. Effective immediately. 5/22/2020HouseFiled with the Clerk by Rep. Charles Meier 5/22/2020HouseFirst Reading 5/22/2020HouseReferred to Rules Committee 1/13/2021HouseSession Sine Die