Changing Bills of Exchange Receivable 

You can make any necessary changes to a bill of exchange receivable in the document or by changing line items in the customer account or reconciliation account (special G/L account). You can find further information on changing documents or line items in Account Balances and Line Items and in FI - Document Posting

To change line items, you must select With special G/L transactions in the initial screen. Otherwise, the line items in bills of exchange receivable cannot be changed.