The extension facilitates to apply a specific GST rate for the minimum product price you set. For the product prices below the minimum set price, you can set different GST rate. For example, if you want to charge 12% GST on product prices above 2000, and all the other with 5%, set
GST Rate (in Percentage) = 12%
Minimum Product Price Amount to Apply Above GST Rate = 2000
GST Rate To Apply Products Below Minimum Set Price = 5%