You can use any version of TurboTax to input your sales/dispositions of stocks. You can start out with a lower version, then if you feel you would like more guidance at any time, choose to upgrade and your information will carry over to the upgraded version. 

You can download from the attached link, and if you choose to upgrade, go to "Help" in the top toolbar. You will then pay the difference for your upgrade. (Just remember, you cannot "downgrade" to a lower version).

https://turbotax.intuit.ca/personal-tax-software/download-tax-software.jsp