NP, @steven1.

Sounds like the rollover may have caused some issues.  If you haven't yet started 2019, you may try to proforma a new return but uncheck the box for amended return before doing so.  Otherwise, you only other option is to contact Support and send them the return in the hope that they can resolve it for you.

If I were you, I'd try a new proforma because you may end up spending hours with Support but not get anywhere.