Is there a guideline for shared physical custody situations for Massachusetts?
Most states have one. Check with a family law attorney in Mass. to be sure. However, keep in mind that, in order to get a child support order modified, you have to show a significant “change in circumstance” since the time of the original order. If the shared physical custody arrangement was in place at the time of the original order then that is not a change in circumstance. In the absence of any such change in circumstance, you have little chance of getting the support order modified.