How to change pay period ?

You can only change a pay period ending, shirley19.

Once changed, the Pay period starting date automatically populates from the Pay Run window.

Once the pay run is created, click Finalise Pay Run. You can also select an employee and go to the Actions column. This lets you add adjustments to an employee’s earnings. For more details, check out this article: Pay Run - Setup and Processing.

Let me know if you need more assistance in running payroll.