2019 Desktop Software Error Code 606 when I try to open the software. How to fix this and open my software?

[Rob M]

Joe M.   Thank You so much for taking the time to post this.  You saved me countless hours of time and frustrations.  Words can't express how grateful I am.   I had to do it twice but it worked.  

[AYR2]

I assisted a customer with trouble shooting this error code and it worked. The License code did not match the product...Customer was using TurboTaxDesktop-Business, but the product coming up was TTDesktop-Basic and the Code did not match. Resulting in Error 606 

A resolve to the issue is to Check for Windows update> Install any updates that appear **Even when your system auto-updates, some updates are optional and don't update automatically. Without them, they can impact how programs function**. 

Reboot System> Uninstall the TurboTaxDesktop program>Re-Install TurboTaxDesktop program again. 

The correct product loaded and the customer was able to enter the License Code and proceed.

[dzormelo]

Where did you go to uninstall the Turbo Tax program?

[DoninGA]

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@dzormelo wrote:

Where did you go to uninstall the Turbo Tax program?

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Uninstall using a Windows personal computer - https://ttlc.intuit.com/community/installing/help/uninstall-turbotax-windows/01/25643

Using a Mac - https://ttlc.intuit.com/community/installing/help/remove-uninstall-turbotax-for-mac/01/26050

[ponderosaTX]

Thank you @Critter!  Your tip solved my problem (13 April 2022) when Intuit proved to be a black hole regarding customer support.  In my case, I had ALREADY ACTIVATED my copy of TurboTax but had interrupted my initial  "interview" when the TurboTax script asked me to provide W-2 information because my employer has not bothered to provide the information online (despite over 1,000 employees) and I did not have a physical copy of the form in my possession.   When I tried to resume with my W-2 form in hand, TurboTax choked immediately after performing an update (which it had already done before) and asked for my activation code.  After I provided the activation code (which I had already used to start my return a few days earlier), the TurboTax script rejected the code as invalid.  After reading your tip, I ran Windows Update (which supposed ran automatically yesterday) and rebooted which solved my problem.

[mauricerobichaud2021]

i have version 10