Complete Form W-4 so that your employer can withhold the correct federal income tax from your pay. In this blog, we'll take you through the ins and outs of the W4 form, shedding light on its significance and how to fill it out correctly.The new form has five steps. Employees must fill out step 1 and step 5. To provide: An employer-completed verification of employment, wages, mandatory withholdings and deductions. You must complete a W-4 form for Payroll Management Services to determine how much income tax to withhold from each paycheck. The Form W4 will help you determine the amount of federal taxes to withhold, based on their filing status and exemptions. Use this tool to estimate the federal income tax you want your employer to withhold from your paycheck. This is tax withholding. Thank you for taking the time to complete all the information on this form.