This isn’t normal behavior at all payroll data reverting years, missing EIN/company info, reports not posting that’s severe company file corruption, not just a reporting glitch or Microsoft update. When lists like company info, payroll items and transactions start desyncing like this, the file structure itself is breaking. At this point, basic fixes like Verify/Rebuild usually won’t be enough, but still worth trying on a copy of the file first. If you have any clean backup before this started, restoring that is the fastest and safest option. If not, you’re basically dealing with deep logical corruption, which is why reports are wrong and filings are getting rejected. Before going down the $2K “Advanced Data Recovery” route, some users try working on a copy and attempt a repair to rebuild missing links and lists try some third party tools like Stellar Repair for QuickBooks are sometimes used in these cases to recover payroll/report data when it’s still present but not readable. Results vary, but it’s an option before paying Intuit. Short term, I wouldn’t trust this file for payroll filings at all. Long term, once you stabilize things, strongly consider moving each client to a new clean file with opening balances + fresh payroll setup  because a file showing this level of corruption usually keeps degrading.