Issuance of debit note reply urgently needed

hello everyone

PLEASE REPLY URGENT AS I HAVE TO FILE GSTR3B

i had an query regarding issuance of DEBIT NOTE

i have read at so many places that  u have to issue a debit note when their is differnce in RATE

in cases where the original incoive was issued at a value lower than the acutal value of goods. or post supply price negotiations.


Now in my case i have received some defective goods from my supplier so i have issued a DEBIT NOTE against it..

is that valid as it not a rate differnce case and just  a PURCHASE RETURN

and if the issuance of debit note is correct then i have to show it in GSTR1 as well or not ??
as my GST CONSULTANT keeps on saying that only sales related things have to be mentioned in GSTR1 and in this case it is a PURCHASE RETURN so u dont have to show it in GSTR1 

so please clear it sir