Place chicken breasts into the pot of an electric pressure cooker. Pour chicken broth and taco seasoning over the chicken.
Place the lid on the electric pressure cooker and set the valve to sealing. Set the pressure cooker to “manual” or “pressure cook” for 14 minutes. When the cook cycle is complete, allow the pressure to naturally release for 5 minutes before a quick release of remaining pressure.
Remove the chicken and shred with two forks (or shortcut by shredding with an electric mixer.)
Preheat the oven broiler.
Prepare two large baking sheets with aluminum foil. Spread tortilla chips over the foil in an even layer.
Sprinkle the tortilla chips with half of the cheese.
Place under the broiler for 3 minutes, watching carefully to keep the chips from burning.
Remove from oven and top with the chicken, remaining cheese, and your desired toppings.