State Of Illinois Tax Extension Form - Web the original due date to file and pay illinois individual income tax for calendar year filers is april 15, 2024. Pay all or some of your illinois income taxes online via: Pritzker announced today that his administration is extending the individual income tax filing and payment. The irs and most states will grant an automatic 6.
Web the original due date to file and pay illinois individual income tax for calendar year filers is april 15, 2024. The irs and most states will grant an automatic 6. Pritzker announced today that his administration is extending the individual income tax filing and payment. Pay all or some of your illinois income taxes online via: