Its hard to try and work through what youre seeing and what you want to make happen without the actual file on the screen, but if you enter an amount as a negative (if you have a loss from another pass-thru entity) on the IW it changes the amount on Line 1 of the 568.

I do see on Sch K that adjustment column you mention, and youre right, theres not way to cross reference to see what feeds to that column to work your way back to the point of entry.