Paper employer withholding and school district withholding forms are no longer available. Electronic filing has been mandatory since 2015.Effective 2024, no withholding is required for employees under the age of 18 for any Ohio municipality. This manual will contain Best Practice recommendations based on industry standards. We offer two intake methods for applications: In-Person Appointment Please call (209) 723-3201 to schedule your intake appointment. Annual Reconciliation Returns. All employers required to withhold, file Form IT-3 on or before the last day of February of the succeeding calendar year. Withholding rates or other applicable withholding rates, including minimum or maximum rates applicable in the Participant's jurisdiction(s). Withholding information which one is required to reveal. Every Contractor, Subcontractor or Sub-Tier Contractor must complete this form PRIOR to Project Site mobilization.