I filed my son on my taxes can he file his taxes still

i claimed my son on my taxes he had a summer job and received a tax form can he file his taxes

Yes,he can file his taxes but cannot claim himself as a dependent on his form.
He maybe able to file the EZ form it is very simple to do

Definitely, he can file his taxes. But as per my concern, If the amount was earned as an employee, he isn't required to file a federal return. But if anything was withheld for federal income tax, he can file and get it refunded.