And...even if you have a copy of your 2015 tax return, that would not prove that you paid the state. Your only proof that you paid your state tax due would be your own bank or credit card records. So you need to dig into your own financial records to find some proof that you paid the state of IL.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
