1) you can amend your return to remove the DEPENDENT
2) she can paper file her return anytime ... she doesn't need to wait on you
3) if she was a qualifying dependent on your return then she cannot claim herself even if you don't claim her
There are two types of dependents--qualifying child and qualifying relative. There is no specific income limit for a qualifying child dependent for you to claim them. Here are the requirements:
1. The child must be your son, daughter, stepchild, foster child, brother, sister, half brother, half sister, stepbrother, stepsister, or a descendant of any of them.
2. The child must be (a) under age 19 at the end of the year, (b) under age 24 at the end of the year and a full-time student, or (c) any age and permanently and totally disabled.
3. The child must have lived with you for more than half of the year. Temporary absences while away at college are considered living with you.
4. The child must not have provided more than half of his or her own support for the year.
5. If the child meets the rules to be a qualifying child of more than one person, you must be the person entitled to claim the child as a qualifying child.
6. The child must be a U.S. citizen or U.S., Canada or Mexico resident for some portion of the year.
7. The child must be younger than you (or your spouse, if filing jointly) unless disabled.
If the person doesn't meet the qualifying child requirements, then there is an income limit to be claimed as a qualifying relative:
1. The person cannot be your qualifying child or the qualifying child of any other taxpayer. A child is not the qualifying child of any other taxpayer if the child's parent (or any other person for whom the child is defined as a qualifying child) is not required to file an income tax return or files an income tax return only to get a refund on income tax withheld.
2. The person either (a) must be related to you or (b) must live with you all year as a member of your household. (and must not be in violation of local law)
3. The person's gross taxable income for the year must be less than $4,050 in 2016.
4. You must provide more than half of the person's total support for the year.
5. The person must be a U.S. citizen, U.S. resident alien, U.S. national, or a resident of Canada or Mexico.
If a person meets the requirement to be claimed as a dependent by someone else, they must indicate that on their tax return if they are required to file one.
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