24 year old dependent daughter; full time student. Never filed individually before. This year she made over $6300 but less than $10350. Must she file individually?

Your question is academic.

Because she is over age 23 and made more than $4050; she can NOT be your dependent. The full time student rule extends the ability to claim a child from age 18 to age 23. But at 24, the income test rule applies. See full rules below.

Since she will be claiming herself, the $10,350 limit applies and she is not required to file She may file if she needs to get back any withholding and may qualify for a tuition credit, if she is an undergrad.

DEPENDENT RULES

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  test.

 A child of a taxpayer can still be a “Qualifying Child” (QC) dependent, regardless of his/her income, if:

1. He is under age 19, or under 24 if a full time student for at least 5 months of the year, or is totally & permanently disabled

2. He did not provide more than 1/2 his own support. Scholarships are considered third party support and not as support provided by the student.

3. He lived with the parent (including temporary absences such as away at school) for more than half the year

A person can still be a Qualifying relative dependent, if not a Qualifying Child, if he meets the 6 tests for claiming a dependent:

1. Closely Related OR live with the taxpayer ALL year

2. His/her gross taxable income for the year must be less than $4,050 (2016)

3. The taxpayer must have provided more than 1/2 his support

In either case:

4. He must be a US citizen or resident of the US, Canada or Mexico

5. He must not file a joint return with his spouse or be claiming a dependent of his own

6. He must not be the qualifying child of another taxpayer