If you were a resident of Illinois for part of 2016, you're liable for Illinois income tax on your earnings during that period of time. You have to file a part-year resident Illinois return. See this for further info: https://ttlc.intuit.com/questions/1901227-how-do-i-file-a-part-year-state-return
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
