Field help (BPEACCBPC) 

The customer accounting codes are stored in the Customer record.
The accounting code is a default value used in the setting up of accounting journals. It refers to a table in which a certain number of elements can be found (control accounts, standard accounts or parts of accounts) that can be used to determine the accounting journals that will be posted.
In the case of multi-companies management, the same customer can be associated to different accounting codes according to the company the customer deals with. Use this field to enter exceptions and to set the customer accounting codes by company.