Please see this Turbo Tax help article. 
Error 567809 or 102348: Cannot save tax file or File not found.
https://ttlc.intuit.com/community/bugs-and-error-messages/help/turbotax-windows-error-567809-or-1023...

your link: Page not found

I suggest you try to save it to your Desktop with the Save As function.

1. This will ensure you have a saved file.
2. Log out of TurboTax 
3. Sign out and sign back into your computer
4. Make sure you are saving to your local hard drive and not directly to an external flash drive or a restricted network folder.
5. Sign back into TurboTax
6. Try to save again

Wrong...what worked was posted by Moirty user:

The problem is caused by a new security feature in the latest (and future) updates to Windows 10 called Controlled Folder Access. The feature is intended to protect against ransomware and other threats. To distinguish the difference between legitimate programs and malware, the user is required to provide a list of exceptions. In the absence of an exception, access will be blocked.

The solution is to either make TurboTax an allowed program or to turn the feature off completely.

Settings can be found in Windows 10 at: StartMenu, Settings, WindowsSecurity, VirusAndThreatProtection, VirusAndThreatProtectionSettings, ManageControlledFolderAccess

Problem solved.

Similar but will not save because it is a "read only". I've attempted to rename 5 different ways. It will not accept.

Exact message:

We couldn't save this file because it is "Read Only" or part of a "Read Only" file, such as a CD.

Error: 567812

I opened my previously saved return from a couple days ago-not a "read only" file.