This error on line 11 has occurred for many of us, so many that it is my understanding the responsible experts and programmers are reviewing the matter.
Rather than wait for resolution, I was comfortable is leaving line 11 totally blank rather than place a negative number (which was the calculated answer) or a "0", I was guided to leave line 11 blank. When I did that, the "error" notification was eliminated.
If you do this, go to the actual 1040 ws to make the line 11 error blank. I was unsuccessful when I tried to do it on the error cition sheet which appeared while checking errors.
