Hi @Debbie346,
I had a look at the CRA website and they have a document out that talks about "Accommodation Sharing". It contradicts what the CRA agent told you (especially the 3rd paragraph below that talks about if you are already a GST/HST registrant). You may want to follow up with them again.
The following is what they say about GST/HST:
Goods and services tax/harmonized sales tax (GST/HST) implications
Accommodation sharing falls under “short term accommodations”, which can be defined as rentals where the period of continuous occupancy is less than one month. Rentals of residential premises for periods of continuous occupancy of one month or more are exempt from GST/HST
If you are a small supplier who earns less than $30,000 of gross revenue from accommodation sharing, you may voluntarily register to take advantage of the related input tax credits (prorated in the same manner as the expenses that are deducted for income tax purposes).
If you are already registered for GST/HST, you are required to collect and remit GST/HST on your short term accommodation revenues even if they do not exceed $30,000. Note: This rule may not be applicable to you if you only registered for GST/HST as a result of providing ride-sharing services. Although you would be required to collect and remit GST/HST on income relating to ride-sharing services, if the combination of accommodation and ride-sharing services does not exceed $30,000, you are only required to remit GST/HST on the ride-sharing income, not the accommodation income.
This is the link to the CRA website where I got the information: https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/compliance/sharing-...