You can reverse a payroll in this pay stub generator if the employee has not yet been paid. In this case, you will need to contact them directly and ask them to contact payroll to make the change. If the employee has already been paid, then you will need to contact your ADP Advisor or Account Manager (if you have one) for assistance with reversing a payroll. They may be able to help you do this over the phone, or they may require that you send in a request through email or fax.