The website deals in cosmetic products and we were meant to customize the default checkout process to implement one page/click checkout. We also have implemented tax calculations at the checkout section based on the shipping address entered by the users. For tax calculations, we have enabled Magento’s default shipping methods and have also created a custom extension for shipping cost calculation for Switzerland. As a part of the project, we have also enhanced multiple features such as unique profile ID implementation with export feature, fixations on payment gateway.