My son is 22 he filed taxes for the first time but he only worked from june 2019 thru the end of the year. He lived with me from jan thru june and i provided for him fully, even though he filed could

[xmasbaby0]

Was he a full-time student in 2019?  If not, did he have more than $4200 of income for 2019?

[Opus 17]

If he was not a full time student during parts of at least 5 months (such as, January to May) then he can't be your dependent.

If he was a full time student for at least 5 months, then he can still be your dependent if, considering his financial needs for the entire year overall, you provided more than half.  That will depend on the value of room and board you provided to him (you can count a share of your rent, food and utilities--such as 1/3 the expenses if 3 people lived in the home); plus tuition you paid; medical expenses, travel and personal expenses you paid for.  If you paid more than half his expenses overall, you can claim him as a dependent and he must check the box that says "I can be claimed as a dependent by someone else". 

[KarenM90]

If you are asking if you can claim him as a dependent;

If he was not a student for at least 5 months of the year or is not totally and permanently disabled, he won't qualify as a "qualifying child."

He could be a "qualifying relative" if he did not claim himself (and no one else did either) as a dependent on their tax return, you may be able to claim him if he meets the income and other dependent limitations.

Please see the attached for more information:  Who is a Dependent?