How much money can a dependent make she's 19 and not a full time student

If she made more than $4050 in 2017 then you cannot claim her as a dependent.

That means her total income, not just from working.

For qualifying child for dependent exemption purposes, and for the head of household purposes - the child must be under age 19 and must not provide more than half of his or her own support.

For qualifying relative, the person must have made less than $4,050 in gross income during 2017.

[Edited: 01/19/2018 [7:50pm]