You can't make inactive a payroll schedule that has employees assigned to it. Before you can make a payroll schedule inactive, you must reassign all the employees who're assigned to this payroll schedule to another payroll schedule. How?
To do this task
Open the Payroll Schedule List window.
Click to select the payroll schedule you want to make inactive.
Click the Payroll Schedule button and then click Make Payroll Schedule Inactive.
In the Include Inactive checkbox that appears, click to check it if you want inactive schedules to display in the Payroll Schedule List window.
How assigning payroll schedules to employees work
Using the Payroll Schedule List window