Possibly, but if you have no EARNED income, taxable income or a tax liability, it does not give you any type of benefit to claiming her. Claiming your 18 year old daughter could entitle you to claim the $500 Non-Refundable Other Dependent Credit as well as file as Head of Household. Filing as head of household gives you a higher standard deduction and lower taxable income.
If you do have earned income, taxable income or a tax liability, then you can claim your daughter if the following criteria are met:
- Your child (including adopted and foster children), your sibling, or a descendent of any of them.
- Age 18 or younger at the end of the tax year OR under 24 (and younger than you and your spouse) if they are a full-time student
- Lived with you for more than 6 months during the tax year
- They did not provide more than half of their own support
- They did not file a joint return, unless it was to claim a refund
If you have earned income, you may also be able to claim the Earned Income Tax Credit.
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