04/23/2026
A widespread system glitch at the Michigan Department of Treasury has caused many taxpayers to receive incorrect "Notice of Adjustment" letters claiming they owe money or will receive smaller refunds. This error, combined with 8β11 week processing delays and automatic manual reviews, has left filers stuck in "pending" status.
To resolve this, you should check your status and respond to notices through the Michigan Treasury eServices portal and verify your identity if requested. If you believe the notice was sent in error due to the system glitch, you may disregard the letter as no correction is needed. For further assistance or to confirm your status, you can contact the Individual Income Tax Line at 517-636-4486.