Windows System Requirements says you can install on Windows 7
https://ttlc.intuit.com/community/system-requirements/help/minimum-system-requirements-for-turbotax-...
Installing on Windows 7 Information
https://ttlc.intuit.com/community/tax-topics/help/windows-7-end-of-support-impact-for-turbotax/00/85...
And see
https://ttlc.intuit.com/community/tax-topics/help/what-if-i-don-t-want-to-upgrade-from-windows-7/00/...
