I have the same issue, it looks TT is still doing final tuning to the Michigan State tax return. I connected with an agent and she was not able to determine the issue. She suggested waiting until we receive a notification that the 8915-E is live and released in TT for submitting. I've worked at least a couple of hours trying to find a workaround but I'm not able to find any... so I will wait. 😄 I think E-file is just more convenient.
