To close apps on an iPhone 14, follow these steps:

1. Access the App Switcher:
   Swipe up from the bottom edge of the screen and pause your finger about a quarter of the way up until the App Switcher appears, showing all your open apps as cards.

2. Find the App to Close:
   Swipe left or right through the app cards to locate the app you want to close.

3. Close the App:
   Swipe the app's preview card upwards off the top of the screen. This action will force close the app.

4. Return to Home Screen:
   Tap anywhere below the app cards or swipe up again to return to the Home screen.

You can close multiple apps at once by using multiple fingers to swipe up on several app cards simultaneously. Note that Apple advises closing apps only if they are unresponsive, as iOS manages apps efficiently in the background. Manually closing apps may help if an app is draining battery or using excessive data