What are the formalities in case of purchase/sales returns.
Will have to raise debit/credit notes. During filing of return details of such debit/credit notes will be given along with reference of original invoice number. Treatments of credits will be done accordingly.
Issue debit and credit note and same should be reflected in your GST returns.
Nothing change only changes are in Memo either cas or credit which is totally different from VAT and calculation based og purchase status sheher with in state out side ate or Import Export.