You do not add his wages to your tax return.
If he is single and $8,000 is what he earned for the entire year (both jobs and bootcamp), he does not have to file a tax return. He might want to though to get a refund of the income taxes withheld from his paycheck.
It sounds like you will be able to claim him as a dependent but I do not have enough information to say for certain. You can read the article below to clarify.
https://turbotax.intuit.com/tax-tips/family/rules-for-claiming-a-dependent-on-your-tax-return/L8LODb...
