As a GST registrant, I work as an online fitness coach and nutritionist. I charged my Canadian clients GST for the services I provided. Since I'm not familiar with Canadian taxes, my initial idea was to charge 5% tax. However, I now have an excellent comprehension of how HST taxes are evaluated in each Canadian province thanks to the tax calculator. The reverse tax calculator is a free application with no extra advertisements that provides precise results promptly. I suggest you give it a shot.