1099 NEC child summer Internship

My 18 years old child student got a 1099 NEC from his school installing computers in summer as an Internship and made $ 1500.

I know he has to file his own taxes but is very confusing how to do it. Turbo tax send to to do schedule C ? He has no a business.... no idea how to fill it out or T tax has an option that show   (  this is no money earned as an employee or self employed individual, it is from a sporadic activity or hobby.... some other post  have totally different ways to do it....lots of taxpayers lost like me thank you