Place chicken breasts or thighs in the slow cooker.
Add salsa, corn, black beans, taco seasoning, chicken broth, lime juice, salt, and pepper. Stir gently to combine.
Cover and cook on low for 6 to 7 hours or on high for 3 to 4 hours, until chicken is very tender.
Remove chicken from the slow cooker and shred with two forks.
Return shredded chicken to the slow cooker and stir to coat with the cooking juices.
Divide cooked rice into bowls and top with the shredded chicken mixture.
Add desired toppings such as lettuce, tomatoes, avocado, cheese, sour cream, and cilantro.
Serve with lime wedges on the side.