Almost everybody living person has to be placed on a tax return along with their Social Security number.
A common question comes up regarding unmarried dependent students.
The question most often asked is, how much can they make before filing an income tax return?
Filing Requirements
Question:
How much does an unmarried dependent student have to make before he or she has to file an income tax return?
Answer:
If you are an unmarried dependent student, you must file a tax return if your earned and/or unearned income exceeds certain limits.
To find these limits refer to Dependents under Who Must File, in Publication 501,Exemptions, Standard Deduction and Filing Information.
Even if you do not have to file, you should file a federal income tax return if you can get money back (for example, you had income tax withheld from your pay; you qualify for the earned income credit; or you qualify for the additional child tax credit).
See Who Should File in Publication 501, Exemptions, Standard Deduction and Filing Information, for more examples.