I have eFiled my first T2 successfully.  Now for the first T1 for a common law couple. There are no errors or warnings and the return is marked by ProFile as eligible for eFile.

When saving the file I receive an error "Value cannot be null. Parameter name: source."  See attached.

I click OK and when I go back into the file, the changes made are there.  

When I attempt to eFile the same error appears and I cannot move forward.

Any suggestions?  I have already spent over 3 hours with support getting the software and files loaded onto a new computer.