Hi @Helen3 , yes our property manager has the listings under them. They manage multiple listings for various owners, who like myself are entirely hands-off (except for receiving payments directly from Airbnb).
They have only gotten the response from Airbnb customer service to "contact our tax authority".
As Airbnb as only started the auto-collection of HST tax in Canada as of July, and owners are now filing HST remittances to the government this month, I suspect there will be many folks like myself in the same boat (or in the same boat as @Desmond28). In my small tourist destination in Ontario, there are at least 150 properties managed by property managers (per AirDNA), so probably thousands across Canada.