I'm getting a message that says "E-File is not available because your tax return includes a tax situation that can't be e-filed." The only unusual situation on our return is the MN certificate of stillbirth. But the MN forms list expressly says that e-filing is available for that form (https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotax_mn_online_individual.html). I have no forms that are listed as unsupported for e-filing. What gives - and why is the message so vague? I'd at least like to know what the cause is.