All employees must fill out an Employee's Withholding Allowance Certificate (W4) for Federal Income Tax purposes. Follow the instructions to determine the number of withholding allowances that apply to your situation. You can also click here to use the Internal Revenue Service (IRS) online calculator for further guidance. FAQs about the W4.
If you would like your State Income Tax withholding exemptions to be different than what you are claiming on your W-4 (Federal), you will need to fill out a Massachusetts Employee's Withholding Exemption Certificate (M-4). Follow the instructions on the lower section of the form to determine the number of withholding allowances that apply to your situation.