# Advanced features

Source: https://developer.avalara.com/vat-ecom/about-this-guide/advanced-features/

The table below includes functionality that we suggest building into your integration in addition to the core requirements. The requirements apply only to the advanced features, and “required” components aren’t mandatory to achieve your badge.

[![Closed](https://avalara-devdocs-prod.mcoutput.com/vat-ecom/Skins/Default/Stylesheets/Images/transparent.gif)Credit memos](javascript:void\(0\);)

Requirements for achieving the credit memo advanced feature are coming soon.