Each state in the U.S. has its own requirements for the achievement of a valid General Education Development credential. Visit the official website for the state in which you live, and learn where the valid testing centers are near you.
You'll also find learning centers and other helpful resources.
There is no easy way to earn your GED. If you're going to work hard to get back on your feet, make it matter. Get a GED credential people respect, one that will put you on the track of your dreams.