Original Message

Federal income is federal income.....   so we're not talking federal taxes.

State taxes vary.   Generally, it is based on where the job is, not where you live.   If the job is based in IL, you will likely be taxed IAW IL State tax code, even if you live in a non-tax state, such as TN or FL etc.  You may be taxed by both states in some cases.

I physically lived in Georgia, commuted to Ohio for a job in an airline where I was domiciled, and was liable for State income taxes in both location.