Hello LIANNECHANDLER,
I'm Jin, a fellow Windows 10 user and an independent advisor. I understand that you want to tag people in the Photo App.
You can refer to the link below on how to tag people using the Photo app:
https://www.thewindowsclub.com/find-and-tag-peo...
This is a non-Microsoft website which would provide accurate and safe information. Watch out for ads on the site which are frequently classified as a PUP (Potentially Unwanted Products). There is no need to buy paid products to fix your computers as they do more harm than good sometimes.
Kind regards.