How to add product group without applying TAX

Hi, i have 10 groups of products in witch 8 groups are TAX “GST” payable but other 2 groups are TAX free group. So when i try to configure GST there is no any mapping for product grouping in “Calculation Selector” so please guide me how to configure these groups.


Are you not using the built in tax system? You just map the tax to groups or products which have tax and leave the others.