Hi Ajay,
I was written the following substitution but its not working.
Prerequisite: BSEG-PRCTR= "DE01" (DE01-is our profit center)
substitution: House bank : Constant value : NBADE ( NBADE is our house bank)
with the above substitution house bank is updating in BSEG against account type "S"
Kindly let me know to get populate against vender line item