Sai,
Two questions based on two of your posts in this thread -
1.
Ensure that Reference = C
Any particular reason why Reference number should be C? (in VTFL, header level)
It could be any of the choices given in F4 (for that field), it depends upon the business processes and requirements.
2.
These fields may be used by them for line item opening and payment from customers.
Specifically Assignment number (VTFL, header level);
in table BKPF is this field present?
What do you mean by "item opening and payment from customers"?
Thank you, in advance!