How did you answer these three questions?
Where did Dee Dee spend the most nights in 2018? Dee Dee stayed in both parents' homes equally.
Who had the highest income in 2018? Father
Has Dee Dee's other parent given you the right to claim Dee Dee as a dependent for 2018? No
When I answer like this, I am given no benefits along with nondependent. Maybe be easier just to delete him (after saving his info) so as to not muddy the waters.
