Place chicken bones and vegetables in instant pot.
Add enough water so the bones are covered and add salt.
Put the lid on and set to locked position.
Set instant pot to high on the manual setting for 2 hours.
When the broth is done cooking, carefully turn the valve to release and depressurize.
Once all the pressure is released open the lid and take the inner pot out to let the broth cool for about 20-30 minutes.
Strain the broth through a colander or into a large pot to remove bones and vegetables.
Cover and put in the fridge for several hours or overnight.
Once broth has completely cooled skim the fat of the top and divide into ziplock bags or containers and store in the freezer.