late filing of GSTR 3B

mahendra sahoo (Gst Practicion) (700 Points)

12 January 2018  
Dear sir,
I have late filing of GSTR 3B nil return for month of Aug and Sep in 27.12.2017
Now I want to know what is my late fees amount?

And in which challan column we used for make payment of such late fees? Fees column or penalty column?.