If you are under 25 years old and your software needs to be upgraded, the highest amount charged will be $15 which will be adjusted on the payment page before you Netfile.
When you start a new return, TurboTax will ask you questions about your tax situation and recommend the best product for you. As you work on your taxes, you may have to change products based on the complexity of your return. You may be upgraded to help claim expenses you’re entitled to, but might not know about.
There might be donations in box 46 of a T4 or Employee-paid premiums (medical) in box 85 of a T4 which would require an upgrade to allow a claim for additional credits not included in the free version. Please see the list below enumerating what is or is not included in the free version.