How to integrate QuickBooks Online when it gives "Sorry, an error occurred while processing your request."?

Overview

When trying to get the QuickBooks Online integration setup, after clicking on Integrate the second time, the following error is given:

Sorry, an error occurred while processing your request.

Environment

QuickBooks Online

Resolution

• In the text field on the Integrate screen, enter the name of the product in QuickBooks Online that you want AvaTax to use when adding tax (usually an item named "Sales Tax").
• Click Integrate.
  • If this is not successful, submit a case to Avalara Support.

  • To submit a case to our Support team, please fill out this online form: https://help.avalara.com/Directory/Contact_Avalara/Submit_a_Case