Booking cancelled and refund the amount with gst

Sandeep (Practice) (145 Points)

21 May 2018  

I have given a service od Rs. 100000.00 to party and received the amount with gst 18000.00. Now I have refund half the amount with GST 59000.00 to the party because of half the service is provided. 

Can i adjust the amount with GSTR -3B final tax liability or claim the refund seperately???