This form allows the employee to verify that the employer is withholding the correct tax rates for the correct municipalities. Even if you have employer withholding or are not expecting a refund, you must still file a return.The following examples are based on the official withholding rates as of December 15, 2010, and are subject to change. 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. Sample Forms These sample forms may be useful when filing documents for the civil and family courts. If you have any questions, consult an attorney. 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. Step 1 - Register businesses with the tax collection district. For example, expenditure code 1325 in the General Support function identifies the Treasurer's Office within the financial office of the school district.