AvaTax Tax Code missing in NetSuite item mapping import

Overview

Customer is trying to import tax codes into Netsuite and "AVATAX," is not visable in "Tax Code," dropdown.

NetSuite Basic
NetSuite OneWorld

Customization> Forms> Entry Forms

Click Edit on your default item form

Click Screen Fields

Click the Custom tab

Find the field Avatax Taxcode

Click the Show button

Click Save