I am new to Magento and trying to setup Tax Rules based upon certain product combinations in the basket.
There are three possible tax valuations that I am trying to apply:
STANDARD which is 20% and applied to all "default" users and products. ZERO which is 0% applied to products with the "Assistive" class and applies only to "Registered" users. COMPOSITE which is 4% and only applies when "Assistive" class products are chosen with "Hardware" class and "Installation" class products. 1 and 2 are standard tax rules and have been setup. What I am having difficulty working out is how to create a tax rule which requires more than one Product Class for it to apply.
Is this possible with the core Magento or would it require an additional extension?