Appointment document for Substitute Teaching Associates (TA). When to Submit Form: Substitute forms should be submitted to the APS and Payroll Offices no later than the last working day in the pay period for each pay period worked. Please ensure that the beginning and ending dates of the month in which the appointment will occur are entered on the form and that a new form is submitted each pay period the substitute appointment is needed. After approval by Department Chair and College Dean, forward to APS and Payroll for review and processing.