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Why am I getting the error "Object reference not set to an instance of an object" in Quickbooks Online?


When trying to save or calculate tax in Quickbooks Online, you receive the error: "Object reference not set to an instance of an object" 


Quickbooks Online


  • Go to the connector page (
    • Disconnect the account and Logout
  • Login again and complete the Authorization and Integration process.
    • Go to the Edit Configuration page.
    • Re-enter all valid AvaTax Admin Console account credentials and Validate the credentials
      • For valid credentials, a drop down box for company code will appear.
      • Select a valid company
  • Please verify if the Product Item drop-down list is populated and the user is able to select the correct 'Sales Tax' item.
    • Select a valid 'Sales Tax' item having the account type of 'Sales Tax Payable' 
      • This can be found in the Chart of Accounts
    • Click on Save
  • After saving the changes, click the Integrate button.
  • Try calculating tax on a test transaction
    • The customer card will need to be set up as taxable and a full address
    • The items on the transaction will need to be set up in Quickbooks Online as well