Gst return not file

A penalty of Rs.100 per day is applicable for late filing of GST return. The penalty would be payable for the period in which the taxpayer failed to furnish the return up to a maximum penalty of Rs.5000.

Up to 31/10/2018 one settlement facility is provided for GSTR 1 now its over

The late fees for GSTR-3B is Rs.50 per Day(25 for CGST & 25 for SGST) subject to maximum of Rs.5,000.(For nil return, its Rs.20 per day)

For GSTR_!, Government has waived late fees from Sep 2017 to 31st Oct 2018. From Nov Onwards, the late fees is Rs.200 per day subject to maximum of Rs.5,000.(for nil return,its Rs.100 per day).

Also you have to pay interest @ 18% on the GST Liability from Last due date till the payment of GST.