You cannot be his dependent if you had more than $4050 of income for the year.
There
are two types of dependents, "Qualifying Children"(QC) and standard ("Qualifying
Relative" in IRS parlance even though they don't have to actually be
related). There is no income limit for a QC but there is an age limit, a relationship test and a residence test. Only a QC
qualifies the taxpayer for the Earned Income Credit.
You cannot be a QC because you are over 18 and not a full time student; so the income test applies.
