Estate Management 101 A will may be only one of the documents you need—and one factor to consider—when it comes to managing your estate Share | Related Content When Do You Need a Will? When do you need a will? The answer is easy: Right Now. When Heirs are Imperfect The money problems or bad lifestyle habits of adult children could lead to the squandering of any inheritance they receive. What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability.