Though we recommend using Windows 11, the Canadian version of TurboTax Desktop 2025 will run on Windows 10. Please see this TurboTax Canada FAQ for more information: How does the end of support for Windows 10 affect my TurboTax Desktop experience? 

We currently sell TurboTax Desktop 2019 & onwards, so those years should work with Windows 11. Older years' software might still work with Windows 11, but we no longer support those years so we can't say for sure. 

This TurboTax Canada FAQ has information on how to install older versions of TurboTax Desktop: What if I have trouble with my licence code while setting up TurboTax Download?