How to add an AirTag to my find my iPhone

Hey LaurenMidlam,

Were you able to follow the steps in the guide you recently viewed? It has all the information you need to set up your AirTag with your iPhone. Start with the "What you need" section to make sure everything is ready to go, then move on to "Set up your AirTag". Here's that link and the start of the resource, just in case: Set up your AirTag using your iPhone, iPad, or iPod touch - Apple Support

What you need 

• An iPhone, iPad, or iPod touch with iOS 14.5 or iPadOS 14.5 or later and two-factor authentication turned on. 

• Find My turned on.

• Bluetooth turned on.

• A strong Wi-Fi or cellular connection.

• Location Services turned on: Go to Settings > Privacy > Location Services.

• To be able to use Precision Finding and to see the most accurate location for your AirTag, turn on Location Access for Find My. Go to Settings > Privacy > Location Services, then scroll down and tap Find My. Check While Using the App or While Using the App or Widgets. Then turn on Precise Location.

Thanks for using Apple Support Communities.

Take care!

Good afternoon LaurenMidlam,

While you can connect multiple AirTags to an Apple ID, you can't connect an AirTag to more than one Apple ID.

The resource below explains:

If an item or device is connected to another Apple ID

Take care.