Add beans, corn, and salsa to slow cooker. Top with chicken breasts and sprinkle taco seasoning over the chicken.
Pour water (or broth) over the chicken.
Cook on low for 6 to 8 hours or on high for 3 to 4 hours.
Shred chicken. Serve over rice. Top with cheddar cheese, cilantro, sour cream, jalapenos, and/or avocado as desired