If you are using TurboTax Online, there’s no way to recover a return once you have deleted it. If you got the email with your confirmation number, then your return was filed. If you didn’t get the email, you can check with the CRA to see if they received it: https://turbotax.community.intuit.ca/replies/2647719
You have clicked a link to a site outside of the TurboTax Community. By clicking "Continue", you will leave the Community and be taken to that site instead.