How do I claim GST on a customer refund?
I use cash base for accounting and the customer paid $1000 including GST for a service in 3rd quarter 17/18. I have already submitted my BAS and paid the GST for 3rd quarter. I have now in the 4th quarter refunded the customer their $1000 and the service was not carried out. I have added a refund receipt but am unsure how to claim back the GST that I have already paid for the income transaction. The GST adjustment doesn't show up in the GST section.