You can't claim your grandson's if you didn't provide more than half of their support.
The 5 tests that will qualify a child as a dependent are:
- Relationship: Must be your child, adopted child, foster child, brother or sister, or a descendant of one of these (grand or nephew).
- Residence: Must have the same residence for more than half the year.
- Age: Must be under age 19 or under 24 and a full-time student for at least 5 months. They can be any age if they are totally and permanently disabled.
- Support: Must not have provided more than half of their own support during the year.
- Joint Support: The child cannot file a joint return for the year.
The 4 tests that will qualify a relative as a dependent are:
- Qualifying Child: They are not the “qualifying child” of another taxpayer or your “qualifying child.”
- Gross Income: The dependent being claimed earns less than $4,200 in 2019 ($4,150 in 2018).
- Total Support: You provide more than half of the total support for the year.
- Member of Household or Relationship: The person (a friend, girlfriend, non-blood relative) must live with you all year as a member of your household or be related to you.
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