Chunk precooked chicken and season with taco seasoning. Add to the pot. (if using fresh, cut into bite size pieces and saute with olive oil until no longer pink)
Pour in all other ingredients leaving breasts on bottom of pot, do not stir contents.
Close lid and steam valve and set to high pressure for 10 minutes followed by a quick release.
Open and shred chicken with 2 forks or chop up on a cutting board and put back into the pot.
Serve topped with cheese, sour cream, cilantro etc....