How do I turn power off my air tag?

Hello missnadina,

Welcome to Apple Support Communities. 

We understand that you want to know how to power off an AirTag. We are happy to help.

There is not a way to power off an AirTag. Here’s information on how to set up an AirTag: Set up your AirTag using your iPhone, iPad, or iPod touch - Apple Support

"Set up your AirTag

1. Make sure that your device is ready for setup.
2. If your AirTag is new, remove the wrap around the product and pull out the tab to activate the battery. Your AirTag will play a sound.
3. Hold your AirTag near your iPhone, iPad, or iPod touch, then tap Connect.* If you have multiple AirTags and see "More than one AirTag detected", make sure that only one AirTag is near your device at one time. Need help connecting your AirTag? 
4. Select an item name from the list, or select Custom Name to name your AirTag and choose an emoji. Then tap Continue.
5. To register your AirTag with your Apple ID, tap Continue again. 
6. Tap Done. 

Now you can attach your AirTag to your item and see it in the Find My app. "

Let us know if you have further questions.

Take care.