When you go through the IL state interview, look for the screen titled Here's the income that Illinois handles differently. Scroll down to Education. See the options below:
College Savings - If you added money to a college savings pool or pre-paid tuition program, this applies to you. This includes Bright Start and Bright Directions college savings pools and College Illinois pre-paid tuition programs.
Illinois ABLE - With Illinois ABLE, you can save for qualified disability expenses. The earnings on your investments are federally tax-deferred and tax-free, if used for qualified disability expense. If you added money to an Illinois ABLE program, this applies to you.