Just because a divorce has been "settled" already, it does not mean that there are not certain things that you can do to alter it after the fact. This might be in relation to real estate or alimony.
If you start divorce proceedings before Dec. 31, 2018, and you will pay alimony, you will still be able to deduct the total amount you pay each year from your taxes. Your ex-spouse will still be required to pay taxes on the total amount of alimony each year.
Sometimes, biological parents are not in a fit state to take care of their dependent children. This could be due to many factors including mental illness, drug or alcohol addiction or the fact that they are serving a prison sentence. Children whose parents are unable to adequately care for them may have to enter the foster care system. However, a great alternative to this is if another family member, for example a grandparent or grandparents, can take full custody of them instead.
Relatively recently (in the last 40 years) has it been a right as a grandparent to be able to seek to visit a child. Now, every state had a legal stance on visitation rights for grandparents and other non-parental relations.