There are links with more information within the email. Also, this only applies to stays booked after July 1 2022.
https://www.airbnb.ca/help/article/2283/tax-collection-and-remittance-by-airbnb-in-canada
Hosts with Airbnb listings who aren’t registered for Goods and Services Tax (GST), Harmonized Sales Tax (HST), and/or Québec sales tax (QST) won’t have any obligation to collect and remit the GST, HST, and/or QST on their accommodation themselves. The National law will require Airbnb to collect and remit these taxes on their behalf.
Hosts with Airbnb listings who are registered for GST, HST, and/or QST should continue to account for the GST, HST and/or QST on their accommodation. If this applies to you, you’ll need to provide your GST, HST, and/or QST ID to Airbnb so that Airbnb won’t collect and remit these taxes on top of your accommodation price. If you self-collect GST, HST, and/or QST, please provide this information to avoid changes to your pricing.
@Christine3207 @Dawn298 @Nan-And-Michael0 @Irina195