Did he get a W2? No, his income only goes on his own 1040 return. They don't have to file if they only have W2 income under 15,750 (2025) but can file to get back any withholding taken out in boxes 2 or 17. But you don't get boxes 4 or 6 back. If they got a 1099Misc or 1099NEC they have to file it as self employment income no matter how small the amount.
If you file a 1040 return for him be sure to check the box on his return that he can be claimed on someone else's return. That is very important. It will be under My Info when you fill out his personal infomation.
He can probably use the Online Free Edition. You can start another return in TurboTax Online by:
Logging out if you are in your account
Choose what TurboTax Online product you want to use for the second return
https://turbotax.intuit.com/personal-taxes/compare/online
Create your account screen
Set up a new login for the second return
Start working on the new return
Or use the Desktop program. The Desktop program can do unlimited returns and efile 5 for free. And you can use any Desktop version, they all have the same forms. So you could use a lower version than you might need in the Online version.
