Details needed...but you should probably call Customer Support anyhow:
How do I contact TurboTax?
____________________
Other than that:
1) Windows or MAC?
2) IF Windows, try rt-clicking on the startup icon and select "Run as Administrator"
still no go?
3) Check for any waiting or partially installed Windows OS updates and fully install them, then reboot even if there aren't any...and use #2 again.
Nope?
Back to Customer Support (above)
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*