You cannot update TurboTax for tax year 2016 to file your 2017 tax return. You need to purchase TurboTax for tax year 2017.
You can use TurboTax to file your taxes this year even if you didn't use TurboTax last year. When you enter your information in TurboTax, ensure you are entering your carryforward amounts from the previous year. You can find your carryforward amounts from your Notice of Assessment for 2016 or by contacting the CRA if you tax return preparer did not hand this information to you.
