Why is my address validation call through REST API resulting in error?

Overview

We sent messages to validate address 
(https://avatax.avalara.net/1.0/address/validate) and get tax 
(https://avatax.avalara.net/1.0/tax/get), and the result was different. 

The message contains exactly same address, but the validate address 
returned success, and the get tax returned error on its address.

Environment

Avalara Avatax

Resolution

• This is happening because through the REST API it is required for address validation calls to be sent with the following end point:
• (https://avatax.avalara.net/1.0/address/validate)
• The call will fail if not done so.
• The end point (https://avatax.avalara.net/1.0/tax/get) is strictly to be used for Gettax calls.