How do I fix the Estimate Tax button not appearing in QuickBooks Online?

Overview

The 'Estimate Tax' button is not appearing in QBO.

Environment

Intuit QuickBooks Online

Resolution

• Navigate to https://avataxforqbo.com and click on 'Edit Configuration'
• Simply press Save, no changes need to be made.
  • Please note, you may need to add in your AvaTax Username and Password.
• Back at the main page (https://avataxforqbo.com), click on the toggle to first Disconnect, then click Re-Connect to reactivate the integration. 
• Log out of QuickBooks Online completely
  • Close any QuickBooks Online tabs
• Log back into QuickBooks Online
• You will see the 'Estimate Tax' button and overall improved calculation speeds. 
• If that does not resolve the issue, clear your browser's cache and log back into Quickbooks Online 
  • If you still cannot see the Estimate Tax button, go back to https://avataxforqbo.com and deactivate the integration, then reactivate.

For more info, see Why is there no estimate tax button after connecting Avatax to QuickBooks Online?