You should update your Future File whenever any relevant information changes (you updated a password, got a new account, changed jobs, bought an insurance policy, etc.).
Also, we recommend updating the file two-times-per-year with recent statements and information. You can do this on the spring ahead/fall back daylight savings time days, your birthday and half-birthday or two other dates throughout the year to make sure that the file is up-to-date for your loved ones. It defeats the purpose of the Future File if your loved ones have out of date information.