Paper employer withholding and school district withholding forms are no longer available. Electronic filing has been mandatory since 2015.All employer withholding returns and payments are required to be made electronically. Complete Form W-4 so that your employer can withhold the correct federal income tax from your pay. Give Form W-4 to your employer. For state purposes, an individual may claim only natural de- pendency exemptions. This includes the taxpayer, spouse and each dependent. How to fill out the Ohio Employer Withholding Tax Information Release? Submit form IT 4 to your employer on or before the start date of employment so your employer will withhold and remit Ohio income tax from your compensation. Effective 2024, no withholding is required for employees under the age of 18 for any Ohio municipality.