Pour 1 cup of the salsa at the bottom of the Instant Pot. Then add the chicken breast on top, 1 cup of water, and season the chicken with 1 tablespoon of the taco seasoning.
Cook on high pressure for 10-12 minutes and let the instant pot naturally release for 10 minutes when it is finished.
Shred the chicken to your desired size and mix it back with the salsa it was cooked in.