When Special Care Is Needed: The Special Needs Trust A special needs trust helps care for a special needs child when you’re gone. Share | Related Content When Do You Need a Will? When do you need a will? The answer is easy: Right Now. Critical Estate Documents Sound estate management includes creating financial and healthcare documents. Here's an inside look. What Is My Life Expectancy? Estimate how many years you may need retirement assets or how long to provide income to a surviving spouse or children.