since there are no bills in the month of september 2019 and there are 2 invoices of aug 2018 which are not uploaded in gstr1 of aug 2018 but 3b of aug 2018 has been filed with the figures of those invoices. now i have uploaded those invoices in gstr1 of sep 19 but I want to ask you that IS GSTR 3B of sep 2019 to be filed as nil?????????????????? PLEASE REPLY AS SOON AS POSSIBLE