Opus,
I very much appreciate your help.
I have followed the process you outlined, and I still do not have the problem resolved. I have created 2 returns, 1 with no gambling (wins or losses), and 1 with identical gambling wins and losses (my tax return).
Line 11 on Form 1040 correctly corresponds to the gambling winnings.
Schedule A, line 12A exactly corresponds to the gambling losses.
Form 1040, line 15 is the same for both the gambling and non-gambling cases.
Here is where the differences appear. Schedule 1040, lines 16 and 18 have a much higher number in the gambling case than the non-gambling case. That traces back to differences on Schedule 2 line 12, which traces back to Form 8960. On Form 8960, the difference appears in 2 places. Line 9b, which is slightly higher for the nongambling case, and Line 13, which is dramatically higher for the gambling case. In turn, Line 17 on this form is significantly higher for the gambling case.
The key appears to be Line 13 on Form 8960. For that Form, no more tracing back - Turbotax simply says "see instructions."
Something has been created that ends up not canceling out gambling wins and losses. Is this a software issue?
