Layer the ingredients: Place the chicken in the slow cooker. Sprinkle the taco seasoning evenly over the top.
Pour the salsa over everything, making sure the chicken is mostly covered.
Cook low and slow: Cover and cook on Low for 4–6 hours or on High for 2.5–3.5 hours. You want the chicken to be tender and easy to shred.
Shred the chicken: Transfer the chicken to a plate and shred with two forks. It should fall apart easily.
Return the shredded chicken to the slow cooker and stir to coat in the juices.
Adjust seasoning: Taste and add a pinch of salt, a squeeze of lime, or a dash of hot sauce if needed. If it’s too saucy, leave the lid off and let it simmer on High for 10–15 minutes to reduce.
Warm the tortillas: Heat tortillas in a dry skillet, over a gas flame, or wrapped in a damp paper towel in the microwave until soft and pliable.
Assemble the tacos: Spoon chicken into tortillas and add your favorite toppings—think onion, cilantro, avocado, cheese, and a squeeze of lime.