If your business stock is completely destroyed by fire with no salvageable value, you generally cannot claim an Input Tax Credit (ITC) refund. You will need to reverse any ITC already claimed on the lost goods. However, you are typically not liable to pay GST on any insurance claim received for the fire damage.
14 June 2020
I think that even ITC already claimed in respect of goods lost in fire needs to be reversed. I will revert back after verifying the issue.