unfortunately that is a generic error code that Illinois uses. the issue may be
1) inaccurate personal information, such as misspelled names or incorrect Social Security numbers
2)Selecting the wrong filing status
3)Errors in reporting add-backs or subtractions
4)Incorrect withholding data
5)Claiming non-eligible credits
6)Noncompliance with e-file requirements
this public forum has no access to your return
you can contact support
https://support.turbotax.intuit.com/contact
800-446-8848
You could also try contacting the Illinois Department of Revenue
https://tax.illinois.gov/aboutidor/contactus.html
is there a message the comes with the rejection code?
When you try to print and are prevented is there a message that indicates what the issue might be?