Need Help with State Reject Code IL1040-8100-1

You should have received an email from Turbo Tax which explains the reason for rejection. Look for that email explaining the problem.

It probably is an identification verification error. Either there is an issue with your state ID card, the prior years Adjusted Gross Income or the 8 digit Illinois PIN, whichever you are using to prove identification. Look at those inputs and see how they were entered.

IL1040-8200-1 - The Primary Taxpayer Drivers License number or State ID number did not match the Drivers License or State ID number on the Illinois Department of Revenue production file. At least one of the following Primary Taxpayer signature fields must be present and match the department production file: Primary IL-Pin, Primary Prior Year AGI, or Primary IL Shared Secrets Drivers License/State ID Number."