Add chicken, corn, black beans, diced tomatoes, refried beans, and salsa in the instant cooker.
Pour chicken broth over all the ingredients, but do not stir.
Set the timer for 7 minutes on high pressure. It will take several minutes for the cooker to come to pressure because of the amount of liquid.
After 7 minutes of pressure cooking, allow pressure to release naturally for 10 minutes. Follow this with a quick release. (Please read manufacturer's directions carefully regarding pressure release)
When pot has depressurized carefully remove lid.
Remove chicken, place on a dish and shred using two forks.
Return chicken to the pot and stir.
If you are not serving soup immediately, leave the instant cooker on “warm”.
When ready to serve, ladle soup into individual bowls and top with whatever toppings you may like. Suggestions include: crushed tortilla chips, cilantro, cheese, avocado, a splash of lime juice, chopped green onions, or even diced jalapeno peppers if you’re feeling spicy!