You do NOT report his work income on your return.   If he needs to file a return then it goes on his return. 

https://ttlc.intuit.com/community/children-dependents/help/do-i-need-to-file-my-own-taxes-if-i-m-a-d...

A dependent's earned income is never entered on your tax return.

If the income was earned as an employee where a W-2 was received then he does not have to file a tax return if that is his only income.  Unless he wants to file to get a refund of the taxes withheld (if any), then he would enter on his tax return that he can be claimed as a dependent.

If he earned the income as a self-employed person receiving only cash or a Form 1099-MISC then he is required to file a tax return since the income was greater than $400.  He reports the income and any expenses on a Schedule C for self-employment, part of and included with his personal tax return Form 1040.

If he needs to file he can use the Free Edition or the Free File website.

Online is only good for 1 return per account.  But you can use the same email address for 5 accounts.   How to start another return in the Online version

https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-onli...

In order to use the Free File program, you have to start it at a special website.  Click on the bottom Orange button I Qualify Start Now and set up a NEW account

http://turbotax.intuit.com/taxfreedom/