The New York Matrimonial Addendum (840M) is a document that provides additional information related to a couple's marriage, which is necessary when filing for a divorce in the state of New York. The 840M form includes information such as the parties' income, assets, and liabilities, as well as details about their children. It is used to help the court determine an equitable distribution of marital property and the appropriate amount of alimony or spousal support. There are two types of New York Matrimonial Addendum: the 840M-1 and the 840M-2. The 840M-1 is used for couples who have no children, and the 840M-2 is used for couples who have children.