Place chicken, onion and peppers into pot. Sprinkle taco seasoning over the top and then all of your salsa.
Close lid and cook ideally on low heat for 6-8 hours or until the meat shreds easily with 2 forks. If it requires you to pull then it needs more time. Should be easy to shred and very fork tender.
Mix contents after shredded and serve inside tortillas or over rice.