I am teaching only Finance. I have a PhD in Finance, I am teaching Finance at a University, and I think I am qualified to be a tutor in Finance. I don't have a PhD in Accounting, so I am not teaching accounting. I don't have a PhD in Marketing, so I am not teaching marketing. I don't have a PhD in Biology or History, so I am not tutoring biology or history.
I am very skeptical of tutors who claim they teach all subjects, especially at the University level. I don't want to mislead students. ...