Should I claim my son as a dependent and impact on his taxes?

My 19 yr old son started working last year (2023) but still lives at home and I believe I still pay for more than half of his living expenses.  I started to claim him as an dependent on my taxes as I've always done (but I haven't filed yet).  Before I do file, how does that impact his taxes?  I don't necessarily want to negatively impact his potential return.  Thoughts / Suggestions on what I should from experts or other parents that have been thru this?  This scenario will probably exist for me for a few / many years while he lives at home and while my younger son get to be that age too. 

 

Thank you,

Rob S.