What is the maximum a dependent can make in a year to still claim

[TomD8 · Accepted solution]

If the dependent is 19 or older as of 12/31/2018, and not a full-time student, the maximum is $4150 (2018).

[jess1ca3]

what if he was turned 19 in nov and made 4300

[TomD8]

Was he enrolled as a full-time student for at least part of 5 separate calendar months in 2016?

[jess1ca3]

no

[TomD8]

Then you cannot claim him as a dependent.

[WookieWB]

Dependents & Exemptions
Question: Is there an age limit on claiming my child as a dependent?
Answer:
To claim your child as your dependent, your child must meet either the qualifying child test or the qualifying relative test:
To meet the qualifying child test, your child must be younger than you and either younger than 19 years old or be a "student" younger than 24 years old as of the end of the calendar year.
There's no age limit if your child is "permanently and totally disabled" or meets the qualifying relative test.
In addition to meeting the qualifying child or qualifying relative test, your child must also meet all of the other tests for claiming a dependent:
Dependent taxpayer test
Citizen or resident test, and
Joint return test
Additional Information:
Who Can I Claim as a Dependent?
Publication 501, Exemptions, Standard Deduction, and Filing Information

[WookieWB]

(from IRS.gov)