Banking and Cash Management > Banking Setup > Define Own Bank Number
  
Define Own Bank Number
In order to process banking transactions, you need to set up your own bank number, which is the account number for the entity in which you are currently working. The entity bank consists of:
The bank GL account to which the postings are made
The own bank account number for the entity, where payments from customers are received and from where payments to suppliers are made
The business relation, which contains the address and tax information for your bank
To create an own bank account number, you need to create a GL account of type Bank Account, and link it to your current working entity. When the account you create is of type Bank Account, the Banking Tab in Account Create is enabled so that you can specify the additional details required. See Banking Tab for more details on these fields.

GL Account Create, Banking Tab