Hey DJ -
I just went through the exact same experience with TurboTax. Never got prompted about the tax credit and didn't learn about it until after I filed.
1. Were you able to resolve this with an amended state form (IT-40X)?
2. On the amended state form, did you just enter a credit for the amount that your previously owed on line 13 & attach your Illinois return? Anything else?
Thanks!
