How can we improve WHMCS?

In BC another provinces in Canada, as well as some states in the US there is a second tax that only applies to certain services and products. The way WHMCS is setup right now if you add a second level tax it applies to everything invoiced in that Province/State. This is a big problem as we would be charging extra tax and people would not use our services. If we don't add it though than we can get investigated by the Government and fined for not collecting tax that is required by law. We really need to feature added so we can specify which products should include second level taxes, it should not be to hard there is already a check box for taxes just split out in to two boxes one to apply first level tax and one to apply second level tax.

Nick D.
Canhost.ca