TurboTax FAQ
TurboTax FAQ

Error 401: "The remote server returned an error: (401) Unauthorized"

The following message occurs when attempting to update TurboTax:

Error 401: The remote server returned an error: (401) Unauthorized

Possible Cause

A defect in Microsoft .NET causes a communication error between TurboTax and the update server.


  1. Go to the Windows Update site www.windowsupdate.com and check for updates.
  2. Download and install this update:

    Microsoft .NET Framework 3.5 Service Pack 1 and .Net Framework 3.5 Family Update (KB951847)
  3. Restart your computer if prompted to do so.
  4. Reopen TurboTax and try updating again.
  5. If the error persists, download and install a manual update.