It's not guaranteed. TurboTax only provides updates and support for the current year's tax software, plus three years prior. So for this year, TurboTax software for 2016, 2017, 2018 and 2019 should work fine. Anything prior to 2016 may not function properly.
Reference: Can I use TurboTax to prepare 2015, 2014, or earlier tax ...
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