Did you check the box for military pay on the "Do any of these uncommon situations apply to this W-2?" screen after you entered your W-2? This box is what the state return triggers off and then the military pay exclusion is automatically entered on your IL return.
Thank you for bringing this to our attention.
I think it would be helpful to have a TurboTax ".tax2019" file that is experiencing this issue. You can send us a “diagnostic” file that has your “numbers” but not your personal information. If you would like to do this, here are the instructions:
For TurboTax Online:
For TurboTax Desktop:
I'll be able to open TurboTax with your numbers but not your personal information. That may help diagnose the issue.