You are clicking "Validate" while configuring AvaTax for NetSuite. You receive the following error "Enter the correct Account Value and License Key and URL provided during registration".
This error is caused by using production AvaTax account credentials in a NetSuite sandbox or vice versa. Production NetSuite instances can only use production AvaTax account credentials. NetSuite sandbox instances can only use AvaTax development accounts.
The username and password can be verified by logging into the Admin Console.
The Service URL must match the account type during validation.
This issue is resolved by entering AvaTax account credentials that match the NetSuite account type.