You can use TurboTax Free Edition as long as you are filing a 1040EZ or 1040A with the standard deduction. Otherwise, it will prompt you to upgrade to the version that best suits your needs.
Please see the below FAQ regarding is "TurboTax Free Edition Right for Me?"
I've also included an FAQ on the TurboTax 2017 Product Guide with explanation of each program offered.
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