To apply online, you'll need to fill out a child support online application. To fill out the Worksheet you need to have income and expense information for both parents.Use the other parent's Financial Statement if you have it. Learn how to fill out a Financial Statement Form, which you need for many types of cases in Massachusetts Probate and Family Court. See how parenting time affects the total. To calculate how much child support you should pay or receive, simply fill in the following information and click "Calculate". You are required to assign your rights to financial support and your rights to medical support to the Massachusetts. Massachusetts child support is money that one parent pays to the other parent. Both parents are responsible for supporting the child in Massachusetts. Learn how child support is calculated, enforced, and how it can be modified in MA.