# AvaTax configuration window

Source: https://developer.avalara.com/products/ecm/integration-guides/document-management/gpv1621199904590/

Guide: Exemption Certificate Management (ECM)

# AvaTax configuration window

Understand the required elements and endpoints for configuring the AvaTax connection.

**Element type:** Required

**Endpoints/Models used:** [QueryCompanies](https://developer.avalara.com/api-reference/avatax/rest/v2/methods/Companies/QueryCompanies/)

Your configuration dialog window must allow the user to specify the following configuration/connection information:

-   Service URL to access the connector (for example, Production or Sandbox)

-   Sign in with an account number/license key or with username/password

![AvaTax Settings](https://knowledge-be.avalara.com/bundle/hxd9079947903116_hxd9079947903116/page/pmw0052806368987.image?_LANG=enus)

-   **[Configuring authentication](/document-management/ztc4788162197830/)**  
    Understand the advantages and disadvantages of account ID/license key authentication to configure the best method for your needs.