On Sch NJ-DOP: Sch DOP, Line 4-Net gains This form may require an adjustment that has not been finalized for this release. I typed 0 on 4. (net gains) still not working

on 4. Net gains (add lines 1,2, and 3) (Enter here and on line 19. if loss, enter Zero here and make no entry on line 19)
I am able to enter 0 but I have no idea where or how to remove entries on line 19.   any help will be greatly appreciated.  Thanks.