It depends on more than that. What kind of income do you have? Like any investments? If you buy the Desktop program you can buy the lowest version. All desktop programs have the same forms. So you can buy Basic or Deluxe if you need a state return.
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If 2017, you can also use TT Online when it becomes available in December.
For most simple returns, you can file for free if you get in early enough. Turbotax has "free" online for simple federal returns, and the state return is also free if you file during the "Absolute zero" promotion (assuming they offer it again.)After Absolute Zero ends, a simple federal return may be free but the state can be up to $39.
Even if you have a complicated return, you can file for free using the Tax Freedom version if your income is less than around $33,000 (the threshold may change for this year.) It's a separate web site, though. https://turbotax.intuit.com/taxfreedom/