I have exactly the same problem (and it seems that similar problems were reported to TT last year as well.)
The offending entry on my Mass. Sched C, line 11 that TT inserted was -54 and the return was rejected by Mass DR because the value is negative. It should have put in a positive value (the paper Mass Sched C form has no provision for negative values in that field).
I was able to search the PDF of the saved tax returns for the offending value and it comes up In the Federal/State Adjustment Summary, where there seems to be some (small) $54 difference between what Fed and Mass. allows for business losses (I had about $3600 in losses).
TT advises to check for multiple businesses (not applicable here) and also advises to print out the failed return and mail it in. But I worry that that return will also be rejected. TT says nothing about that and I am trying to find out what are the consequences.
It occurs to me that perhaps I can delete $60 in expenses and avoid this TT error, but is that OK? Doing that might create discrepancies between Federal and state returns that might end up producing more headaches down the pike. It's incredibly annoying because of such a small glitch in TT that has not been corrected. You would think that TT would at least detect the error and not allow the returns to be filed.
