Hi, Canadian retailer here.
The taxes on the shipping are not calculating properly for us.
For instance on one order it was supposed to be 5% and calculated at 3%, on another it was supposed to be 14% and calculated 8.5%. It is working fine for product taxes and the percentage is entered correctly in tax rates.
I have been through the sales tax tutorial numerous times and all seems to be in order.
Any ideas?

Thank you!