1) What are the different in law or actual duties between a caregiver and a guardian for a minor in USA or just CA?
2)To be a caregiver or a guardian, any tax benefit?
I asked my husband for it:
Guardian is a legal term. That may imply they have legal status and possible have some tax benefit.
Caregiver: is very generic term. It could be anybody, a nanny or could be a guardian or parent, or someone else.