This documentation is for Taxamo v1. If your account is with Taxamo v2 use the documentation at integrate.taxamo.com/doc.
If you are uncertain of your version please contact support@taxamo.com for assistance.

When using taxamo.js for country detection how do I hide the widget that displays the detected country?

The simplest way is to use CSS:

#taxamo-confirm-country-overlay { display: none };