@Sandy976 does Airbnb have an agreement with your government to pay this direct? If not is the HST just charged on the Airbnb fees which is their obligation or the full rental amount which is your obligation? Finally have you set your listing up correctly with the relevant taxes and tax identifiers?
Have you tried asking in yourLocal Host Clubs - it might be worth popping there for more area specific regulations and licences, things like that. Please let me know how you get on. Rebecca 🌟