How do I add a tag to a component

Exactly like the header states. How would I set up a tag to a component. If you need more info read below.

At the moment I have an AI that attacks the player using a actor tag but I am using a VR character so the AI attacks the center of the room (in the real world) instead of the player. I am trying to get the AI to attack the character mesh and I can do this if I am able to set up a tag to a component like the player capsule for instance.

Here you go:

Thank you.