I was having the same problem - "1040/1040SR Wks: Line 11 is too large".
I couldn't delete the red "0." that TurboTax put there. Highlighting it and clicking on it brings up a Supporting Details box. Highlighting it and hitting Ctrl X does nothing, as does Ctrl D. Copying a blank line from the form and pasting it in the line 11 box won't work either.
POSSIBLE FIX:
Since I do have a -ve amount (i.e. a refund) on line 10, I used Ctrl D (override) to set line 10 to zero -- the error message for line 11 is now fixed and the federal review found no errors.
