Do I add my 18yr old's W2 to my taxes, or does he file seperately? And can I still claim him as a dependent since he still lives with us?

[xmasbaby0]

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/

[Critter-3]

Do I add my 18yr old's W2 to my taxes   NO

or does he file seperately?   seperately

And can I still claim him as a dependent since he still lives with us?  Yes up to the age of 19.