Tax-related Inquiry about OA Amazon FBA

Hi, I am from Canada, and I did Online Arbitrage through Amazon FBA in the US marketplace.

I wanted to ask what I need to include when I fill out my taxes. If I am at a net loss, would I still get taxed? I was able to sell my books; however, I am in the negatives when you consider the cost of the books (bought from Amazon/eBay), Amazon fees, Keepa subscription, and so on.