# Authentication in AFC

Source: https://developer.avalara.com/products/communications/integration-guides/communications-integration/tis3223535618368/

Guide: Communications

# Authentication in AFC

This first task describes authenticating in AvaTax for Communications using the API, including the available authentication methods. It also provides helpful information about AvaTax for Communication's 2 environments: [Sandbox](https://communicationsua.avalara.net/) and [Production](https://communications.avalara.net/).