@jamiemonroe3 --
If you were a non-resident of Illinois for all of 2023, and you never actually (physically) performed any work within Illinois, then your remotely earned work income is not taxable by Illinois. If this is your situation, and if Illinois taxes were mistakenly withheld from your pay, then you must file a non-resident Illinois return on which you show the withholding but allocate zero income to Illinois, in order to obtain a complete refund.
A few states tax non-resident remote workers. Illinois is not one of those states.
If you received a refund of taxes paid to Illinois in 2022, and you had deducted those taxes on your 2022 federal return, then the refund would be taxable on your 2023 federal (but not state) return.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
