With that in mind, the ultimate results of calculating child support will likely depend on the unique circumstances of each individual’s divorce and custody case. With joint custody there will often be situations where both parents will need to come together to decide issues on behalf of their child—deciding a process ahead of time can set expectations and avoid one parent being left out. The software also describes your schedule in legal terms for the parenting plan. 2. Include information about legal custody The software gives you several options about how you and the other parent will share and divide legal custody.