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
Here is some information that may
help you find your files if you used TurboTax CD/Download. It mentions 2016
files, but the information is similar for 2017 files:
https://turbotax.community.intuit.ca/replies/3285180