You can use Windows 7 for your 2019 return.
Yes, although it is recommended that TurboTax 2019 be used with Windows 8 or higher, it can be installed on a computer with Windows 7.
Please note that you will not be able to use TurboTax 2020 with Windows 7.
If you want to keep using Windows 7 after 2019, consider TurboTax Online for your tax preparation needs.
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