That is a Windows Installer error - https://answers.microsoft.com/en-us/windows/forum/all/im-getting-window-installer-error-2894-when-i-...
This is a rare error when installing TurboTax. Try uninstalling TurboTax and then re-start your computer. Then install the software again. If it still fails with the error then you need contact TurboTax support.
See this TurboTax support FAQ for contacting support - https://ttlc.intuit.com/turbotax-support/en-us/help-article/account-management/contact-turbotax/L2y9...
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
