Smartcheck flags an error in "Deferral for Certain Schedule H or SE Filers Smart Worksheet

Under this section line 11's value of "0" is flagged with the message "1040/1040SR Wks: Line 11 is too large.  This is probably because line 10 is a negative number.   I am due a refund so I don't think  Turbotax should have filled out this section.