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How do I resolve an error HRESULT = 429 (1AD) when installing AvaTax for QuickBooks Desktop?


You are trying to install Avalara AvaTax for QuickBooks but in the middle of the installation process an error is appearing, and it cannot complete:

HRESULT = 429 (1ad)
Class not registered (Exception from HRESULT: 0x80040154




  • This error indicates your QuickBooks installation has an issue, where a particular file is not registered or is of a different version than expected, refer to Intuit support documentation to resolve issue.
  • Install the Avalara software once you have completed updates to resolve the QuickBooks issue



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