The Help Center
Can I update 2017 to 2018 version without buying the whole new 2018?
Each year’s edition of TurboTax only has the forms
for that particular year. So if you want to do a return for 2018, you’ll need to
buy the 2018 version, which you can do here: https://turbotax.intuit.ca/personal-tax-software/download-tax-software.jsp
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