You need the service URL for the AvaTax calculation service.
Avalara provides two API environments, Sandbox and Production. Customers can use the Sandbox environment to test their integration, and the Production environment to store their vital business data. To request a Sandbox account, please open a support ticket.
|Service||Sandbox Environment URL||Production Environment URL||Documentation|
|AvaTax REST Service URL|
|AvaTax SOAP Service URL|