Not sure where to post this. To date I have had no luck with any VM tax solution - but this week came across
www.virtuemartflextax.com which says it can display Canada tax correctly and guess what? It can! I bought a one developer license to it and have tried it and it correctly displays GST & PST. It doesn't seem to show HST - I'm going to email the developer on that - but wow! It does exactly what Bob Bloom said his did... and didn't. This is game-changing for me: I have not been able to use VM for clients even though I develop primarily in Joomla because my clients are Canadian. Kudos to the developer. Very nice. There are screenshots on the site.