Hi Siva,
In case of third party sales company bills customer after recieving the vendor invoice only. Especially to know how much quantity that the vendor has delivered to the customer. The controls lies in the third party item category TAS and copy controls. In TAS for the field billing relevance we will put 'F'(order related billing doc.- status according to invoice quantity) and in the copy controls between sales document(e.g: OR) and billing document(F2) for the item category TAS for the field billing quantity we will put 'F'(invoice reciept quantity less invoiced quantity). These configuration settings will always ensures in third party sales that always the quantity for commercial invoice for customer will be copied from the vendor invoice to the company.
Regards,
S.Himavanth.