It depends on what type of income he received, and whether he's your dependent, but if the $7,799 were from wages, he wouldn't need to file a return, either way.
Please see the TurboTax FAQs below -- the first addresses his filing requirements if he's your dependent, and the second addresses his requirements if he's not your dependent.
Do I need to file my own taxes if I'm a dependent?
Do I need to file a federal return
this year?
