You are trying to access the AvaTax configuration no menu options open. You receive error
"Unhandled exception has occurred in a component in your application. If you click Continue, the application will ignore this error and attempt to continue.
Could not load type 'AvaTax.QuickBooks.Controls.ShowMesssage' from assembly 'AvaTax.QuickBooks.Controls, Version=1.0.6239.19224, Culture=neutral, PublicKey Token=null'."
- This is a result of not running the AvaTax installer as an Admin (right click), not running QuickBooks as an Admin (right click on) and not choosing the QuickBooks Desktop - Application Certificate the first time.
- Ensure Full Control is given to the Avalara folder (C:\Program Files (x86) for Users and the Trusted Installer
- Uninstall and reinstall AvaTax for QuickBooks