On was 18 last year and still in high school, made over 30k. can i still claim his a dependent as long as he marks on his that someone else claimed him?

[xmasbaby0]

Yes-----he was a student ---you can claim him as a dependent.

MY DEPENDENT HAD A JOB

If your dependent has a W-2 for his after-school job, summer job, etc. you do not include the information on your own return. You can still claim your child as a dependent on your own return.  He/she can file his own return for a refund of some of his withheld wages (he won’t get back anything for Social Security or Medicare), but MUST indicate on it that he can be claimed as a dependent on someone else’s return.  (Supervise this closely or prepare it for him!)

If your dependent’s earnings were over $400 and were reported on a 1099Misc or 1099NEC then he must file a return and pay self-employment tax for Social Security and Medicare.

You might also want to use free software from the IRS Free File versions:

https://apps.irs.gov/app/freeFile/

[Vanessa A · Accepted solution]

It depends.  If he paid over half of his support for the year, then no, you would not be able to claim him even if he was still in high school. 

So, if he put the money in a savings account and you paid for his general living and life expenses, then yes, you would be able to claim him.

If you charged him rent and he paid for his own food, insurance and clothing, then no, you would not be able to claim him.