Ach hans! I literally filed my taxes an hour before this message showed up. The way I resolved it in the end was I deleted one of the calendar allocation entries that was causing trouble, went to forms mode, manually filled in an IT-203-B Schedule A form (TurboTax didn't let me fill in computed values, so I left them blank), and then I manually added the total into Alloc Wk to get the correct number (I needed to update that number anyway to handle IT-203-F). This gave me a form with what I think is the correct number, and just a few missing calculated values (but all of the important stuff is in the form).
In a few days I'll try redoing the return with the trick suggested here and see if I get the same numbers in the end.
