april to September I have filed GSt return in montly basic but now I want to chose quatrly return so when I chose thus option from GST portal ( Oct to November) GSTR 1 date 11 November optional IFF that means we have to file GSTR1 montly basic and 3B quatrly . we need to deposit tax montly basicn if we go for quatrly return.
For QRMP, IFF is optional but not mandatory till 13th of next month, GSTR-3b to be furnished qtly and tax if any is required to be deposited on monthly basis.