Whisk together the diced tomatoes with their juices and the tomato paste in the electric pressure cooker insert. Stir in the taco seasoning.
Add the chicken breast, thighs, and the hot water to the sauce in the electric pressure cooker insert. Spoon the sauce over the top.
Steam valve: Sealing.
Cook on: Manual/High for 15 minutes.
Release: Natural or Quick.
Once cooked, pull apart the chicken with 2 forks.
Cook rice, as directed.
Prepare veggies.
Serve Instant Pot Ranchero Chicken over rice with side of veggies.