If you're an employer, you need to withhold Massachusetts income tax from your employees' wages. 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. File this form or Form W-4 with your employer. Other- wise, Massachusetts In- come Taxes will be withheld from your wages without exemptions. The new Form W-4 has been re-named 'Employee's Withholding Certificate', reflecting the fact that the form no longer uses personal allowances.