APIs to interface with communications tax engine.
The API requires Basic authentication.
Users with access to multiple clients must also set request header parameter for client_id.
Set client_profile_id to specify profile to be used for taxation.

Effective January 1st, 2022 all Avalara products will be enforcing TLS 1.2 server-side. Please ensure that your implementation sets a minimal of TLS 1.2 encryption when making web requests to Avalara APIs.