1040 Illinois Tax Form - This form is used by illinois residents who file an individual income tax. We last updated the individual. 2024 estimated income tax payments for individuals. Use this form for payments that are due on april 15, 2024,.
Use this form for payments that are due on april 15, 2024,. This form is used by illinois residents who file an individual income tax. We last updated the individual. 2024 estimated income tax payments for individuals.