I believe the problem is with CRA not TurboTax since the same problem is being reported by other tax programs as well. The description for line 14 in Chart A on T936 says to enter zero for line 68140 if line 14 is zero (i.e., you have a net capital loss). You only complete line 68140 if line 14 is positive (i.e., you have a net capital gain).
TurboTax, and the other tax programs, are working correctly and NetFile is wrong.
