Screen 22, Other Schedule K Items
Other Information (4 sections up from the bottom)
Other Items (Line 20c) (bottom section)
Other Items (Ctrl+E) (very last item)

Ctrl+E or click the button to the left of the field to open the pop-up. In the leftmost column (K-1 Code (Ctrl+T)), click the down-arrow and scroll all the way to the bottom. AH = Other Information. Enter descriptions and amounts as you see fit.