I'd recommend starting with deleting the Qcompany.tps file. Firstly, fully close down Payroll Premier.
This is the path if your file is stored locally ie. not on a network - C: hard drive > Program Files > QPRollvXX folder > Data folder. Delete the QCompany.TPS file. * Where XX represents your version of Payroll Premier.
This file is re-created when you next open Payroll Premier.