Does Turbotax support 529 contributions for Illinois? I cannot find where to enter the information and the program did not prompt for it (not asking about deductions)

Yes, TurboTax does support 529 contributions for Illinois.

To enter your Illinois 529 Plan contributions education in TurboTax, follow the below steps:

• Select the State Taxes tab
• Proceed through the state interview section for Illinois, answering all questions on residency and income, until you get to a page "Here's the income that Illinois handles differently"
• Under Education, click on Start for "College savings and prepaid tuition plan contributions"
• On the next page, "College Savings and Prepaid Tuition Plans", enter your 2021 529 plan contribution amount in the box for "Bright Start College Savings Pool", If the contribution is a gift, check the box, and click on Continue button