TurboTax for tax year 2019 and QuickBooks 2020 will install on Windows 7 (Service Pack 1 or later) PCs. However, they strongly recommend upgrading your operating system before installing these products.
As of January 14, 2020, Microsoft no longer provides security updates or support for PCs running Windows 7. This means that computers running on Windows 7 will be more vulnerable to security risks and viruses. To avoid these risks, Microsoft recommends upgrading to Windows 10.