You don't include their income on your return. It would only go on their return if they are required to file one. Be sure they check the box that says they can be claimed on someone else's return. That is Very important!
If they only got W2 income they don't have to file if it is less than $6,300 except to get back any withholding taken out.
If they got a 1099Misc for any amount they do have to file a return for it.
Online is only good for 1 return. But you can use the same email address for 5 accounts. How to start another return in the Online version
https://ttlc.intuit.com/replies/3288574
