How do I resolve 'This Document has not used AvaTax Services for Tax Calculation. Taxcode selected is not an AVATAX Taxcode' in NetSuite?
The error is due to not selecting the tax code of "AVATAX" on the Netsuite document and not selecting "AVATAX" as the default tax code on the "Tax Calculation" tab under Avalara > Setup > Configure Avalara.
This error is due not using the proper "AVATAX" tax code. The tax code "AVATAX" must be in all caps not "Avatax".
If no calculation is desired, no action is necessary. If calculation is desired, simply select an AVATAX tax code, or the native tax code -Not Taxable- and save the document.
If you do not wish to use Avatax, and want the warning message to not appear you can disable warnings in your Avatax configuration in Netsuite by selecting "only errors" in the appropriate checkbox.