Question 20: During the month of Jan.,2018, we have sold goods of Rs.2Lakh and issued Debit note of Rs.1 lakh and issued credit note of Rs.5Lakh GST payable @12% on sale and debit note is Rs.36,000/- for last month sale and reduction allowed on credit note of Rs.60,000/- for past three months sale. but as per instruction of taxable value given in 3B return (GST) the value of taxable supplies = value of invoices + debit note - value of credit note + value of advances received for which invoices not issue - value of advances adjusted against Invoices in other words our supplies value comes ( - ) 2Lakh and system not taking the same/ (-) negative figure hence I request you to please guide how we can show above value of supply and how we can get the credit of Rs.60,000/- in our GST 3B return when we are unable to show value of credit note in taxable value os supplies.

Answer Taxable supplies for the purpose GSTR-3b is Value of invoices + value of Debit Notes ' value of credit notes + value of advances received for which invoices have not been issued in the same month ' value of advances adjusted against invoices.
According to above turnover for the purpose of GSTR-3B is Negative (i.e. 2 lakh+1 lakh-5 lakh = -2 lakh) and system not taking negative value. So our suggestion is you will file Nil GSTR-3B return for the January month (where their is no other details like purchase etc. in GSTR-3B) or file Zero value (no value ) in S.no 3.1 of GSTR-3B and you will subtract unavailed credit notes of (Rs 200000) from succeeding month GSTR-3B. because GSTR-3B is summary return and does not require details of invoice or credit notes/Debit notes.
But the details of invoice and credit notes and debit notes issued during tax period shall be correctly shown in relevant periods GSTR-1.(REPLY dt.07-03-2018)