How can I add varied GST percentages at product level?

Hi Team,

I need to add a varied GST % level for the products listed on our site. For eg; Candles are at 12% GST & Face creams are at 18%. I need to drop down section at the product level to choose the 12% GST/ 18% GST and how it reflects in the final check out bill. So far all the products are billed at 18% during checkout, which is not correct.

Please do suggest changes in settings to resolve the matter.