This is what an employee tax expert said in another thread. It's ridiculous that the "expert" on this thread immediately posted to just mail it in instead of waiting to see if it's a bug within the program:
Yes, there is an issue and are working to resolve it quickly. The expected resolution is due tomorrow, February 7, 2020. Please sign up at this link to be notified when it is resolved: Household Member SSN invalid in Michigan state review.
