just to test it, suggest using the IRS tool to confirm the child is a dependent. If the IRS says he is a dependent, then either TT has a problem or there is something about how you are entering things that is amiss, but at least this will narrow it down.
it'll take under 5 minutes to complete
https://www.irs.gov/help/ita/whom-may-i-claim-as-a-dependent
thanks.....
