Place the chicken breasts in the crock pot.
In a medium bowl, combine salsa, taco seasoning mix, chicken broth, lime juice, ground cumin, chili powder, garlic powder, onion powder, and salt. Stir until well mixed.
Pour the salsa mixture over the chicken breasts in the crock pot, ensuring they are well coated.
Cover and cook on low for 4 hours, or until the chicken is fully cooked and tender.
Once cooked, remove the chicken breasts from the crock pot and shred them using two forks.
Return the shredded chicken to the crock pot and stir to combine with the sauce.
Warm the tortillas in a dry skillet over medium heat for about 30 seconds on each side or until soft and pliable.
To assemble the tacos, spoon the shredded chicken onto each tortilla.
Top with shredded cheddar cheese, shredded lettuce, diced tomato, chopped cilantro, and a dollop of sour cream.
Serve immediately and enjoy your crock pot chicken tacos.