BADI_acc_document problem with multiple implementations

hi experts,

i need to post hsn_Sac from bapi_Acc_document_post extension2 parameter uploaded from excel for the transaction fb60 , There are two implementation for the filter type bkpff already with some buisness(for badi_Acc_document) logic at present ! i need to create new specific implementation to write my logic to update hsn_Sac and gst_part from excel ! so it goes to my newly implemented implementation how can i make sure ! the system to stop in my implementation hence it is already stopping in another existing implementation.