On Wednesday, August 20, 2025, IIT phone lines will be down for maintenance. However, you can access tax account information or ask a question online.
If I am entering the information from last year's (2023) return, why am I not given the option to make an eCheck payment?
If you are receiving a message indicating we are unable to validate the information provided, it is possible the zip code you have entered is not correct. If you have moved since filing your Michigan Individual Income tax return, try entering your current zip code as our records may have been updated.