Place one cup of water in your Instant Pot and place your chicken right inside. You can place your chicken on a steam rack depending on how big your chicken is.
Add any seasonings you want on top of your chicken (this is optional).
Put the lid on and set the Instant Pot to Manual (if you don't have a manual button, put it on pressure cook or high pressure) and adjust the time.
For a thawed 3 to 4 pound chicken, set the time for 30 minutes. For a frozen 3 to 4 pound chicken, set the time for 50-60 minutes.
Sometimes I like to let my chicken stay in the pot and steam to release naturally for 15 minutes. But if you are in a hurry, turn the knob to venting and let the steam release.
Then, pull out the chicken. If you want your chicken to be browned, put it in the oven on broil for a few minutes until the skin is browned and crisp.
Notes
To crisp up the chicken skin, you can broil it in the oven once cooked in the Instant Pot. Put the chicken on a sheet pan, and place in the oven on the broil settings. Broil for a few minutes (depending on your broil settings).