11zz has nothing to do with section 1256 c/b
[MODS] there's a bug in Turbotax desktop. In step-mode, there is no subscreen/dropdown to detail where the amount on line 11ZZ on a partnership K-1 goes. The only place you find out there's a problem is in final review
for OP the 11ZZ amount would need to be entered on line1 of the subschedule for the amount. OP, if you're using a desktop version you can go into forms mode, then to the k-1, and finally on line 11 click on the quickzoom link. to enter 11ZZ on line 1 of subschedule. decription - as given trader expenses.
