To clarify, are you referring to a previous year's return? If so, what version of the product did you use? TurboTax Online, Desktop/Download, TurboTax Free?
If you are using TurboTax Online:
Here is the URL for TurboTax Online 2017: https://ww1.2017.turbotaxonline.intuit.ca/?_swlg=en
There are a few reasons you might not be able to find the TurboTax Online return you’re looking for. https://turbotax.community.intuit.ca/replies/2648026
If you are using TurboTax CD/Download:
This mentions previous years, but you can use it to help find this year’s return as well: https://turbotax.community.intuit.ca/replies/3285180