Question: how to find out how much you owe the state of illinois?
Answer: State: Illinois., Refund Status Website: https://myrefund.illinoiscomptroller.com/, Refund Status Phone Support: Individual Returns: 800 732-8866., Hours: Mon. ... , General Illinois Tax Information: 1-800-877-8078., Online Contact Form: http://www.revenue.state.il.us/AboutIdor/ContactUs.htm.