Auto Debit note with HSN for Rate differences, Schemes by

Auto Debit note with HSN for Rate differences, Schemes by vendors etc.

We need to create debit notes with HSN for rate differences, schemes or promotions offered to us which could be invoice based or on monthly targets.-Finance
Secondly we also need to create auto debit notes directly at time of GRC if there is any qty or rate difference in Vendor bill and Physical stock receiving.- Procurement