Which version of TurboTax do I need if submitting a form T1170? I've read TurboTax supports this but also read that I'll need to paper file. Please help!

All versions of TurboTax have all the forms and schedules you need to prepare and file a complete and accurate return. However, TurboTax Premier is the product we recommend if you have things like investments and capital gains/losses. 

You can compare the different versions of TurboTax Online here: https://turbotax.intuit.ca/personal-tax-software/online-tax-software.jsp

If you have a Windows PC, you may want to consider TurboTax CD/Download: https://turbotax.intuit.ca/personal-tax-software/download-tax-software.jsp

I did as suggested and upgraded to Premier.  However, once in the Premier version, I searched the form T1170 and nothing came up - let alone the schedule 3.  I have also heard that one has to paper file in this instance.  There doesn't seem to be a firm answer for my case and I'd really appreciate the right guidance.