Registered from 13th June 2019, opted for quarterly GSTR1 what about late filing fees

CA FINAL RESOURCES (26 Points)

21 August 2019  
I have voluntarily registered under GST from 13th June. Opted for quarterly GSTR1, but being unaware of due date, I missed the GSTR 1 (Quarterly due date) 31st July, 2019.

Will I be liable for late fees? if yes, how much?