With that amount of W-2 income, your son is not required to file a tax return, but if tax was withheld from his pay, he could file to seek a refund. If he does file a return he needs to say that he can be claimed as a dependent on someone else's tax return.
Since it is expensive to purchase software for 2017, he could prepare a Form 1040EZ on paper and mail it in.
https://www.irs.gov/pub/irs-prior/f1040ez--2017.pdf
https://www.irs.gov/pub/irs-prior/i1040ez--2017.pdf
https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment
If he needs to file a state return, the forms can be obtained from the state's tax site:
https://ttlc.intuit.com/questions/1901670-how-do-i-contact-my-state-department-of-revenue
Federal and state returns must be mailed to separate addresses.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
