Here's a couple articles
How to manually update Turbo Tax program for Windows,
https://ttlc.intuit.com/questions/1901192-manually-update-turbotax-for-windows-software-basic-deluxe...
Troubleshooting update issues on Windows
https://ttlc.intuit.com/community/troubleshooting/help/troubleshoot-turbotax-for-windows-updating-is...
