Can I jump in here with an unrelated question?
I started a new job last year and my new employer began withholding Illinois tax despite me living and working in New York (confusion because my direct boss works out of Chicago). I got it corrected but it took a few pay periods to go into effect. Meanwhile I was being taxed both by IL and NYS/NYC. Some googling told me I can file a non-resident return for Illinois to get that money refunded, some of which I would need to pay to New York to make them whole. What I found online indicated that when completing my IL return, I should override what was auto-populated as my state wages through my W2 entry, reporting $0 in wages earned in Illinois instead, and doing so would give me all those taxes paid as a refund. Last night I did everything and it seems to have worked out right between what I have coming back from IL and what I owe to NY.
Question is...I assume this is an easy red flag, after all, my employer has put on record that I earned $X in Illinois during 2014, and now I'm saying I didn't. Is there anything else I need to do to document this at this point, and is there anything I might need to do in the future? I read somewhere that the money I am getting back from IL could be treated as income in the future but that doesn't seem to make much sense.
Big thanks.