Set your instant pot to sauté mode. Add in your vegetable oil. Allow that to heat up. Once hot add in your onions. Allow that to sauté for about three minutes until translucent and softened.
Once your onions have cooked, add in your ground beef and taco seasoning. Brown your beef.
Add in your remaining ingredients: garlic salt, salt and pepper, corn, black beans, tomatoes, and chicken broth.
Play some lid on your instant pot, and seal. Close the ceiling valve by pushing it away from you. Set your instant pot on high pressure for six minutes. Once the timer is done, do a quick release by bringing the valve closer to you and releasing pressure.
Once the pressure has been fully released, the silver pin to the right will drop. Open the lead by twisting it open.
Mix together, and transfer to your favorite soup bowl. We like to top of our taco soup with crushed up tortilla chips, cheese, jalapeños, sour cream, etc. Or keep it as is for a low-carb option.