Changing your default bank account
If the bank account that appears when you open the transaction entry window isn't the one you generally use to pay your suppliers or receive payments from customers, you can change it.
To change the account used for receiving payments in the Receive Payments window and the Applied Payment Details window, choose Setup menu>Linked Accounts>Receivable Accounts to display the Sales Ledger Linked Accounts window. In the Bank Account for Customer Receipts field, enter or select the correct account for your receipts, then click OK.
To change the account used for paying suppliers in the Pay Suppliers window, choose Setup menu>Linked Accounts>Payable Accounts to display the Purchase Ledger Linked Accounts window. In the Bank Account for Paying Suppliers field, enter or select the correct account for your supplier payments, then click OK.