Put chicken or turkey carcass in instant pot.
Fill Instant Pot with water to the 8 cup level, even if the chicken or turkey carcass isn't fully submerged in water.
Put remaining ingredients in instant pot.
Place and lock lid on Instant Pot and turn venting knob to "sealing."
Plug in and turn on Instant Pot by pressing "Manual." The default cooking time will be 30 minutes and "High Pressure" will be lit. Don't press any other button, and the cooking will begin.
The whole cooking time is a little less than 1 hour. You can open the Instant Pot lid when the silver float valve has descended back down below the surface line of the lid.
Strain broth and serve or store in fridge or freezer.