ONE MY CLIENT'S SUPPLIER ISSUED CREDIT AND DEBIT NOTE BOTH ALSO, FROM JULY 2017 TO TILL OCT 2018, NOW MY PROBLEM IS I HAVE REDUCED THE PURCHASE VALUE OF ACCOUNTING ALL CREDIT NOTE ISSUED BY SUPPLIER IN THOSE INVOICES SOME DEBIT NOTES INCLUDED ACCOUNTED AS CREDIT NOTE MISTAKENLY . NOW WHAT TO DO BECAUSE I HAVE FILED GST RETURN SEP 2018, WHAT IS SOLUTION FOR THIS PROBLEM. WHETHER WHILE FILING OCT GST 3B RETURN, ACCOUNTING ALL DEBIT NOTES AND INCREASE MY PURCHASE VALUE.