Do I pay taxes on money earned for being a caregiver to my son? I'm in AZ, employed through a 3rd party vendor for the Department of Disabilities.

I am technically employed by this 3rd party vendor. This 3rd party vendor pays me for the hours I work with my son in our home. It can be helping him learn to get dressed properly, self care, how to pack his lunch, stuff like that. I believe its referred to as rehabilitation.