We're seeing an issue with an opportunity in SalesForce. The 'Do you want Automatic Tax Calculation' setting in our configuration is unchecked, but we're seeing the AvaTax code running and updating the tax now status on the opportunity when sales people make changes. It seems like this shouldn't be happening.
Avalara Avatax for SalesForce
To fix, update to the latest version of quotes, opportunities, and orders.