We have developed a TAX or VAT Module for InfixLMS that work for all course when anyone purchases the course that time added in the billing. You could set up as per your requirement %20 from the system setting. The price of the module only $65, please email support@spondonit.com for purchase. We only support PayPal and Payoneer Payment. One license can use only for one InfixLMS. Purchase the InfoxLMS from here.