Hi Peter. TurboTax has versions to fit everyone's needs. If you're self-employed, I recommend TurboTax Online - Self-Employed (TTSE) version for the extra guidance in the Busines section. If you're not self-employed, I'd start with TurboTax Standard edition.
Here's where to learn more about all our different versions: https://turbotax.intuit.ca/personal-tax-software/online-tax-software.jsp
Tip: TTSE and Premier are both upgraded versions. Once you select either of these, you cannot return to Standard. If you're not quite sure which one you should use, start in Standard.