The IRS has updated the W-4 withholding form. Exemptions (0, 1, 2, etc.) as they were historically defined no longer exist. In order to complete your W-4 accurately it is advised you go to the IRS Tax Withholding Estimator. T he IRS goal is to have withholding more accurately calculated throughout the year and the calculator is designed to ensure you don’t have too much or too little withheld.