No, cumulative is only applied in a few provinces. Some have one tax rate, some have 2, some are cumulative and others aren't. It's enough to drive anyone crazy.
For now I am just focusing on Quebec, because I live there and it has the most bizarre sales tax construct, 2 taxes for which the second one is cumulative.
I use the default tax category to which I added 2 rules, both set to geographical zone Quebec 864. The first rule is the 5% GST and the second is 9.5% QST, which is the cumulative second tax.
I have a customer set up with Canada and Quebec in the profile, but only the first tax (5% GST) gets applied. The second (9.5& QST) is nowhere to be found.
What am I doing wrong? I added screen shots as well so you can see.
Thanks for the help so far!