That is a basis schedule for partners of the filing partnership (P1).

I was talking about basis in a partnership (P2) that the filing parternship (P1) is a partner in.

Eg, P2 income flows into P1 which flows out to partners of P1.  If P1 was an individual, the Individual program tracks the basis of P2.  The Partnership program does not, meaning we have to keep separate schedules to track it outside of the program.  That's what we Dinosaurs did back when dirt was new.  I was kinda hoping I wouldn't have to go back to those bad old days...