Elias here with Shopify Support. It’s great that you’re working on setting up your taxes. As a business owner, this is a really important step.
The Government of Canada actually has a great resource on Charging and collecting sales tax I recommend checking out. This guide should provide some further insight into whether you should be charging sales tax. If you navigate down the page, you will see a section for ‘Foreign customers (outside of Canada)’. That being said, we are not qualified to provide tax advice, so it may still be best to check with a qualified tax professional and ensure you are adhering to your local requirements.
You can also take a look at our ‘Taxes’ guide, which has a section for Canadian taxes and explains how you can set these up within the Tax settings of your Admin.
I hope this helps clarify your question. Let me know if there’s anything else I can help with!