The Tax Engine allows you to collect any indirect charges (VAT, Sales tax, Service Tax, etc. ) that you wish to levy on your Customers/Sub-Resellers for the sale of any product. Using the Tax Engine, you can create unique customized tax rules which would automatically calculate the applicable Taxes based on various aspects such as the Product, location of the Customer/ Sub-Reseller and add this to the respective invoice. You can set these rules from your Reseller Control Panel by going to Settings >> Finance & Billing >> Configure Tax Rules.
Please refer to our Tax Engine KnowledgeBase for further information about setting Tax Rules.