Debit note (purchase return)

NAVEEN (Sr.ACCOUNTANT) (241 Points)

28 February 2020  
I have made a purchase on 12/09/2018 FY 18-19

I found the material is defective can I return the material now with Debit note?

Can the supplier revise his output tax with my debit note?

Is any specific time limit for purchase return In Gst like Vat?