Is it possible to add extra field in quotation, sales order and invoice. This field should be first field and it should appear like sl.no and each product we enter should get 1, 2, 3..so on.
I can say it is applying item numbers (not code) in quotation, sales order and Invoice. This is really important requirement in Indian accountancy.
Let me see if I get this straight: you want a field in those 3 models that contains a sequence that is updated automatically when a new record is created, no matter what type it is. Is that correct?