gst due to be paid

Avisha Majumdar (19 Points)

05 January 2018  
good morning everyone.
I m rented and my landlord is has registered gst .
I have started paying him gst amount from the month of oct...and gst to be paid for the month of July, aug and sept is due.
but landlord has himself paid the GST amount for July,aug and sept from his own pocket...and his gst is registered on 28.8.17

now can I pay him the due amount of gst now...and what will I have to do in my gstr3b return of Jan,17