Please follow below steps for TurboTax Desktop 2025:

• Goto C:\ProgramData\Intuit Canada and check for umid file
• If umid file exists then open a file "C:\ProgramData\Intuit Canada\tt2025\TTConfig.ini" and enter UseCustomUMID=1 at the end of file
• Close and save TTConfig.ini
• Restart the TurboTax application
• TurboTax will launch in previously activated 

If you are still not able to resolve this issue, please contact our phone support team for more assistance. 

@Gilles9999 Thanks for the feedback. 

Hello, 

I tried to activate again and it works for me. Thank you. 

So glad to hear 🙂 

I have the same problem when trying to restart turbotax 2025 after activating and using it 3 days earlier. I have the umid file but adding UseCustomUMID=1 on a new line at the end of the .ini file did not help. Calling the customer support was useless as all they could say was it shouldn't happen so just use up a second activation to use the program again.  I don't want to use up all my activations because I do wish to install it on my laptop etc. And who's to say this wont just happen again?  I just had the same problem with turbotax 2024  not recognizing a previous activation on the laptop I was using last year.  This is not good Turbotax. What now?

@NGW Are you using Windows 11? When you changed the umid file, did you do make sure to do it for the 2025 program = "C:\ProgramData\Intuit Canada\tt2025\TTConfig.ini" as I might have put 2024 in my previous post by mistake.

Yup, that fixed it. Sorry I should have noted that year issue myself but I just copied and pasted (like a lemming). Sigh...     Thanks  very much for such prompt and helpful assistance.