Adding to Eduardo's comments, ideally, for exports scenario, you need to create commercial billing document only against delivery and not against a proforma.
whereas customer invoice is based on proforma invoice then how we can generate outstanding invoices against each customer
For this, you can develop a report fetching all the document references based on which, finance team can clear the outstanding. Alternatively, you have to consider going for FI enhancement through which, the proforma reference has to be included against each line item wise in FBL5N. Talk to your FI consultant to explore on this
G. Lakshmipathi
