TurboTax 2021 update fails with a generic error message. Manual update outside of TurboTax (as suggested) runs to successful completion but TT update continues to fail.

[speedy_john]

Can't restart TurboTax 2021 since it won't go past updates.

[Ebony A]

Your question shows as being generated using Turbo Tax Online; please confirm which product you are trying to use?

[speedy_john]

Turbotax Deluxe Federal & State Returns Tax Year 2021

[CarissaM]

Please follow the instructions here to perform a manual update on the software if using desktop. 

If using online, please try to clear the cache on your browser and try again. 

[speedy_john]

The stand-alone update works fine.  Unfortunately, when you start up Turbotax again, it's says an update is needed and fails.

[Ebony A]

If the issue persists after the manual update, you may try uninstalling and reinstalling the software; this can be done by following the steps in the resources below. Please note that by doing this, you will not have to re-enter all your tax data; it will still be stored separately in your documents (should be a .tax2021 file). However, as precaution, you will see the steps for making a back up copy.

Uninstall Turbo Tax for Windows

Reinstall Turbo Tax for Windows
 

Remove and Reinstall Turbo Tax for MAC

[speedy_john]

Thank you for trying to help.  I have decided not to continue with Turbotax.