Here are two FAQ's written BY TurboTax that explain clearly that returns prepared using desktop software are not stored on the online servers.
https://ttlc.intuit.com/questions/1901659-find-your-tax-data-file-in-mac
At the bottom of this one it says
Note: We can't retrieve tax returns that were prepared in TurboTax Desktop software because your data is stored locally on your computer's hard drive. This is the case even if you e-filed. E-filing doesn't create copies on our servers.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/find-last-year-tax-data-file-...
At the end of this one it tells you:
A .tax file can only be opened in the TurboTax Desktop software. Because it's stored locally on your computer, we can't retrieve tax data files prepared in the TurboTax Desktop software. E-filing doesn't keep a copy of your return on our servers.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
