2025 IL-1040 Individual Income Tax Return

Did you know you can file this form online?

Filing online is quick and easy!

File your 2025 IL-1040 without having a MyTax Illinois account (non-login option) Under the Individuals tab, select “File a 2024 IL-1040.” Follow the instructions to complete your return.
If you already have a MyTax Illinois account, you can login to your account to file your IL-1040 if you meet the eligibility requirements.

For a printable version, download the PDF form. Follow the instructions to complete and mail your return.