The Michigan Department of Treasury has been made aware that some "Reminder of Tax Due" letters sent to taxpayers contain an incorrect toll-free (1-800) TTY number, which may connect callers to a potential scam. Taxpayers with questions regarding unpaid individual income taxes are asked to contact the Treasury directly at 517-636-4486. We apologize for any confusion or concern this may have caused.
Michigan Certified Assessing Officer (MCAO)
Please continue to monitor this page for future MCAO programs. The next MCAO program is tentatively scheduled to begin in June 2026.
MCAO Application Review Process
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