credit notes in returns

KUMAR SWAMY MASNA (accountant) (103 Points)

26 April 2018  
A pesticides dealer gets discounts as cash discount and product discount and other discounts. Is it mandatory that all credit notes mentioning in gstr 3b return? The dealer get all details of credit notes very late, mid of the May the due date of 3b was over now what to do now. If I posted the all credit notes to p&l account what will happen?