Slice your chicken breasts into 2" pieces.
Place your chicken breasts, water, taco seasoning, and ranch dressing mix into the Instant Pot and stir it all together.
Then close the lid and turn the steam release valve to "sealing" position.
Next, press the pressure cook button. Then press pressure level button until high pressure is selected. Set the timer for 10 minutes.
After the timer has completed allow your Instant Pot to naturally release the steam for 10 minutes then quick release any remaining steam. **Warning – The steam is very hot, use a towel to turn the release valve so it does not burn you.
Use two forks and shred your chicken inside of the Instant Pot so they can soak up all of the flavor from the juices.
Enjoy your tacos!!