You might not need to use any other version since you're already in Free Edition.
When you enter in your information, TurboTax will automatically recommend an upgrade to the appropriate version if you need to change software versions.
Go ahead and prepare your return in Free Edition - you should be able to complete your return without upgrading.
You can compare the supported forms here https://turbotax.intuit.com/personal-taxes/online/free-edition.jsp
