Dear sir, 
one of my creditor requested to issue bills dated march 2019,
but at that time I have filed my GSTR 3B of March 2019, 
Now where I have to show that turnover and pay the tax, 
how I have to pass credit to creditor..
Now August month GSTR 3b not filed can I show it in gstr 3b of August, where I have to enter invoices relating to March 2019...