My child worked. Do I need to include her W2?

[VolvoGirl]

No.  It would only go on her return.  If it is her only income AND it is less than $6,300 she doesn't have to file except to get back any withholding taken out.  I assume she is your dependent?  Be sure to check the box on her return that says she can be claimed on someone else's return.  That is very important.

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