Debit and credit note value diffrence

why the amount deffer ??
and debit note is required to provide in gstr 1 

and effect in gstr 3b , u have to reverse the itc in such bills 

Dear Mr naveen ,

Why should i show the debit note in gstr 1 only the supplier will show credit note in his gstr 1 the only effect of the debit not will be in my gstr 3b and gstr 2 which is not available right now pl mind that