Can I still claim my daughter as a dependent if she worked all year and filed her own taxes?

[RyanHinOK]

She is 17 and I normally claim her, but she filed before I could. Do I remove her as a dependent? Or can I still claim her as a dependent? Thank you.

[VolvoGirl]

You can still claim her.  On her return did she say she can be claimed on some one else's return?  If she didn't and claimed herself she will have to file an amended return and you will have to mail your return this year.  

Check her return first page up near the top in the Standard Deduction section.  It says Someone else can claim.....

[Hal_Al]

If she still lives with you, then she is almost certainly still your dependent. 

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

So, it doesn't matter how much he earned. What matters is how much he spent on support. Money he put into savings does not count as support he spent on himself.

The support value of the home, provided by the parent, is the fair market rental value of the home plus utilities & other expenses divided by the number of occupants.

The IRS has a worksheet that can be used to help with the support calculation. See: http://apps.irs.gov/app/vita/content/globalmedia/teacher/worksheet_for_determining_support_4012.pdf

Furthermore, there is a rule that says IF somebody else CAN claim him as a dependent, he is not allowed to claim himself. If he has sufficient income (usually more than $13,850), he can & should still file taxes. In TurboTax, he indicates that somebody else can claim him as a dependent, at the personal information section.  TT will check that box on form 1040.

Even if he had less, he is allowed to file if he needs to get back income tax withholding. He cannot get back social security or Medicare tax withholding.

https://ttlc.intuit.com/community/dependents/help/when-do-i-have-to-answer-yes-to-being-claimed-as-a...

With the tax law change, effective 2018, most dependents will get the same refund whether they claim themselves or not. The personal exemption has been eliminated and the standard deduction increased. 

Note that the requirement is not that you (the taxpayer) provided more than half his support.  The requirement is only that the child did not provide more than half his own support.