Spray bottom of instant pot with oil spray. Add 1/2 cup chicken broth to the instant pot
Add chicken breasts to the instant pot and sprinkle them with taco seasoning
Add black beans, corn, and salsa to the instant pot
Add rice to the instant pot, then add remaining 1 cup of chicken broth; press rice into liquid to make sure it's fully submerged
Cook on high pressure for 8 minutes. Natural release for 12 minutes, then quick release. Remove lid and gently fluff rice with a fork; put lid back on with power off and allow to rest for 5 minutes
Pull out chicken breasts and shred, then return shredded chicken to the instant pot. Serve with your choice of toppings