Troubleshooting

The link that DanielCsta shared is for the US version of TurboTax and it's not applicable to the Canadian version. There has never been a "TaxTools" in any Canadian version. 

To start a new return, select “Start a New Return” from under “My Returns” in the bottom left corner. Once you have started your new return, you can select “View All Returns” from under “My Returns”. Then delete the unwanted return by clicking the small Trash Can next to it or “Delete” under the return’s name.