In a roasting pan add chicken, cover and roast approximately 35 minutes or until the juices run clear. Allow to cool slightly, remove skin and cut into 1" chunks. In a medium skillet, combine chicken, taco seasoning and 1/2 cup water. Cook over medium-low heat just until water is absorbed, approximately 5 minutes.
In a separate pot, warm the beans with a little water to make them more fluid, not runny, just pourable.
Place the seasoned chicken in the bottom of a 9" x13" casserole dish. Pour the beans over chicken. On top of beans, layer with the toppings of choice and serve.