Add the chicken broth and vinegar into the base of the Instant Pot insert. Place the chicken breasts and thighs into the broth. Pour the salsa over the top and then sprinkle the taco seasoning over the top. Give it a gentle stir to incorporate.
Close the lid and set to Sealing.
Cook on Manual, High for 15 minutes. (If cooking from frozen, cook for 22-23 minutes.)
Release: natural, or 10-minute natural then release.
Open the lid and shred the chicken into the sauce, then strain.
Serve as is over rice, or use to make tostadas, tacos, burritos, or whatever! Enjoy!