GST filling

In the bill preparing time wholesaler give a Margin discount to Rtailer
Eg.,( ProductMRP is Rs62 per Qty and Wholesaler give a morgin discount rs 47. 77 and another discount Rs 2.72,) in this case I want to take GST amounts to Magin discount

And Wholesaler take discount benefit from their Agency.
If can't understand this case plz call me to this no 8884868708

Plz immediately required, its Tax audit fill plzz help me..