Using TT Home & Business, I had the same problem with the Sch SE-S showing a net loss, deferral amount of zero on line 18 too big, etc. None of the solutions offered worked for me: enter 260/366? of net loss amount, blank out line 18, delete Sch SE-S and recalculate, put in temporary income to allow decline of SE tax deferral and recalculate without temporary income, etc. What finally worked was ignoring the problem on line 18 (no other problems found), and going ahead to submit. After I clicked on transmit, I got a message that there was a problem found and was blocked from e-filing, the usual SE worksheet came up showing line 18 with the same error message, and the same message came up again, each time I tried to ignore and submit. Finally, I tried to blank out the value in line 18, was successful, and the transmission went through.
