The Illinois Department of Revenue just recently stated I owe them money from 10 years ago and I need my tax filing information.
TurboTax only retains online tax returns for the past seven years, the same retention period as the IRS.
Check with your state to verify the request is valid and find out about the statute of limitations for your state.
This website explains Illinois' collection procedures:
https://tax.illinois.gov/individuals/collection.html#:~:text=Once%20a%20liability%20has%20been,was%20filed%20against%20your%20property.
Note that the statute of limitations may be as long as 20 years.