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.