Activate the sauté function [low or medium] on Instant Pot.
Add the olive oil to the pot, heat it, and once its hot add the ground turkey. Let it simmer for about two minutes, stirring and breaking the turkey down into crumbles as you go. When the turkey is partially cooked, turn off the sauté function.
Stir the taco seasoning into the ground turkey, then add the salsa and green chilies. Mix well, then lock the lid into place, positioning the valve to "Sealing". Cook on high pressure for 8 minutes.
As the ground turkey cooks in the Instant Pot, get your toppings ready.
When the Instant Pot timer goes off, move the valve to "venting" for a quick release. Once the pressure has completely released, remove the lid from the Instant Pot and stir everything up once more.
Pile the filling into your taco shells, top with your favorite stuff, and enjoy!