# Ecommerce workflow

Source: https://developer.avalara.com/goods-calculation-en/design-transaction-workflow/ecommerce/

This workflow describes the API call process at the moment you get on the platform and the API call during checkout.

![A workflow diagram that shows the process customers, marketplaces, and AvaTax Brazil follow for calculating tax during an ecommerce sale](https://avalara-devdocs-prod.mcoutput.com/goods-calculation-en/Resources/Images/DevDot/br-ECommerce-MarketPlace-en_900x566.png)