We have a client that accidentally posted a paycheck to the year 4201. Fortunately, the posting date was correct, so the issue was kept in payroll.
I've gone into the payroll history tables (UPR30100, UPR30100 and UPR30301) and corrected both the date and year fields, and then ran reconcile. I think our immediate problem is resolved, but I noticed that there was a 4201 year still showing under year drop-down on the reconcile window.
Does anyone know what tables are referenced for the reconcile process?