That is what I have been thinking too. In Alberta Canada , one has to have a specific GST account in order to charge GST to someone else ( a client) but that account is required only when you reach a $30.000 income, or revenue, which is not my case, at all. And now Airbnb is deducting already from my listing reservation , the 3%, out of the total paid by the guest. As the GST does not appear as an item or ctegory paid while booking, they are n ot being charged for GST, I am paying GST from evey reservation. I am calling them tomorrow and will be figuring this out. It is wrong the way they are doing it in my case,