Program updates do not lose tax files ... however WIN OS updates can do stupid things ... did you look in the trash ? 

Thanks for your response.

I'm using a Mac.  I did look in trash and still have not found my files.

Let's call for help... @macuser_22  are you out there ???

See:  https://ttlc.intuit.com/community/tax-data-file/help/find-your-tax-data-file-in-mac/01/26206

It is usually stored in your Documents folder unless you overrode the default to store elsewhere.

If you use "TimeMachine" backups then you can probably recover a copy if you accidentally deleted the file.

Need help finding my 2019 return

For our TurboTax Desktop product please see this TurboTax FAQ: How do I get a copy of a tax return prepared with the TurboTax CD/Download software?

TurboTax Online:

First please make sure you are logged in with the correct USER ID in your TurboTax account, this is the most common reason not being able to find your prior year's tax return in TurboTax. 

Once you have logged into the correct TurboTax account please see this TurboTax FAQ for more information on how to access a prior year's tax return.
 

You can also obtain a free federal tax return transcript from the IRS: https://www.irs.gov/individuals/get-transcript

@jenon7906