Place the chicken breasts in the slow cooker.
Sprinkle the taco seasoning evenly over the chicken.
Pour the salsa over the chicken, then add the black beans, corn, and diced bell peppers.
Drizzle lime juice over the mixture and season with salt and pepper.
Cover and cook on low for 6-8 hours or high for 3-4 hours, until the chicken is cooked through and shreds easily.
Once cooked, shred the chicken in the slow cooker using two forks and mix everything together.
Serve the chicken mixture in tortillas and add your favorite toppings.