Various transactions are listed above of which importants ones are covered here briefly

BSX – Inventory postings

You need to update the Inventory GL codes here

BSV – Change in stock accounts

All manufactured and semi finished goods require a contra account when manufactured

GBB – Offsetting entry for inventory posting

All offsetting entries in inventory posting such as consumption, change in stock account, Cost of goods sold etc are updated here.

WRX – GR/IR clearing account

Material provision account when goods receipts are made.

FR1 – Freight clearing
FR2 - Freight provisions

Freight provision account when goods receipts are made.

FR3 – Customs clearing
FR4 – Customs provisions

Custom provision account when goods receipts are made.

All the settings are are at chart of accounts level, meaning there is no reference to any company code. But chart of accounts is assigned to the company code.