Did you pre-purchase a TurboTax online return?
All you need to do is sign in to TurboTax for tax year 2017 and start a new return here: https://ww1.2017.turbotaxonline.intuit.ca/?_swlg=en
TurboTax for tax year 2017 is also from the orange Sign In button in the upper right corner at turbotax.ca.
Here's how you "pay" for your return when prompted: https://turbotax.community.intuit.ca/replies/2648021
