We have updated our online calculator below. An auto-calculating version created in Microsoft Excel is also available for download.To calculate how much child support you should pay or receive, simply fill in the following information and click "Calculate". 2.1 explains the requirements of employers and other persons to withhold the Massachusetts income tax on wages and payments. Massachusetts divorce lawyer Nicole K. Levy reviews the preparation of Financial Statements in Massachusetts Probate and Family Court cases. If a recipient does not file Form M-4P with the payer, Massachusetts withholding will be based on "0" exemptions.