In order to know the posting keys that a Movement Type uses SAP does the following:
- See the table T156 for the relevant Movement Type. Here you find the Posting string reference T156 - BUSTR.
- With the Posting string reference found in T156 - BUSTR see the table T156SY. As you can see, here we find the value string T156SY - BUSTW
- Finally, in the table T156W we see all possible posting keys for the value string
All the tables mentioned here are system tables. Any change to any of
these tables is considered as a modification to the standard system. Before asking please Google it.