Did you use TurboTax Desktop or TurboTax Do It Yourself (Online)? 

If you used TurboTax Desktop, then your returns are only saved on your computer, not on our servers. Try looking in the TurboTax folder in your Documents folder, or use the built in Windows search to look for .tt24 files.

If you used TurboTax Do It Yourself (Online), did you login directly to 2024 to see if your return was there? You can login to TurboTax Do It Yourself (Online) 2024 here: https://ww1.2024.ca.turbotaxonline.intuit.com/

If it wasn't there, do you have more than one account? If you do, your return might be there.