Gst on free goods supply

check this opinion where it says ,tax not applicable .

Pharma Companies Deducting Credit Note from VAT Era in GST Invoices, How a Dealer can Input it in his Accounting Software. 

When Govt. Asks each and every Overheads (Add/Less) with GST Effects how can Companies Deduct Credit Notes in GST Invoices ?

We as Software Developers ask them to feed Credit Note as Separate Voucher with GST Effects but Customers are Insisting us to Provide the same in Purchase Bill. Huge Jam will become at 15 to 20 of each Month for Mismatch of Purchases.