Unfortunately, the link that @TiffanyL provided doesn't mention the Windows Defender issue for which @onthehalfshell provides a solution (which applies to Windows 10 and 11).
Intuit should update its answer at Error 567809 or 102348: Cannot save tax file or File not found to include this scenario. It's at least as likely as some of those currently cited; I'd be very surprised if, say, file corruption were more likely than the Windows Defender threat-protection problem.
