1Place chicken in 3 1/2- to 4-quart slow cooker. Sprinkle with taco seasoning mix; top with chiles. Mix tomato sauce, cumin and coriander seed in medium bowl; pour over chicken. Top with beans.
2Cover and cook on low heat setting 7 to 8 hours or until juice of chicken is no longer pink when centers of thickest pieces are cut and chicken is tender.
3Remove chicken from cooker; place on cutting board. Mash beans in cooker. Shred chicken with 2 forks; return to cooker and mix well.
4Serve chicken mixture with taco shells, cheese, lettuce, sour cream and salsa. Chicken mixture will hold on low heat setting up to 3 hours.