Hey @Ashley117, I am NOT a tax accountant lol, but my husband and I made some inquiries with CRA before starting to host and what we were told is that, if you are hosting in your own home/apartment, you are technically running a small business. Under $30,000 a year in revenue means you do not need to collect or remit GST, but you do need to claim the income on your income taxes. The "income" is any fees you recieve minus any expenses required to run the business. You can NOT claim rent or mortgage, but can claim utilities which can be directly attributed to the business. E.g., because my listing is 1 floor of my 3 storey house, I claim 1/3 of my utilities against my revenues.
Again, it is probably best not to take my word for it. Calling CRA is your best bet.