Illinois 1040 Tax Form - File your return online at: Use this form for payments that are due on april 15, 2024,. Web for information or forms. 2024 estimated income tax payments for individuals. Income tax rate the illinois income.
Web for information or forms. Income tax rate the illinois income. 2024 estimated income tax payments for individuals. File your return online at: Use this form for payments that are due on april 15, 2024,.