Question: what form do you use to change your exemptions?
Answer: Change Your Withholding Complete a new Form W-4, Employee's Withholding Allowance Certificate, and submit it to your employer. Complete a new Form W-4P, Withholding Certificate for Pension or Annuity Payments, and submit it to your payer. Make an additional or estimated tax payment to the IRS before the end of the year.