When trying to calculate tax, it appears to work. Yet, before the amount is recorded in QuickBooks the following error appears:
An action cannot be completed because a component [QuickBooks company name and version] is not responding. Choose "Switch To" to activate the component and correct the problem.
This indicates that there is trouble writing tax information back to the invoice record in QuickBooks, most likely due to network latency. You will need to either reduce the network latency or move the company file to the local computer experiencing this issue.