No. If you have taxable income then it is taxed at the same rate as everyone else.
Although if your total earned income is less than your standard deduction for your filing status, you will not owe any taxes and receive any taxes withheld from your earned income as a tax refund when you file your tax return.
At age 15 you will be a dependent on your parents or guardian's tax return. When you file your tax return you have to indicate on your tax return that you are a dependent.
If you are under the age of 16 at the end of the tax year you can only print and mail the tax return, it cannot be e-filed.
Filing Requirements for tax year 2019 -
Single dependents—Were you either age 65 or older or blind?
No. You must file a return if any of the following apply.
1. Your unearned income was more than $1,100.
2. Your earned income was more than $12,200.
3. Your gross income was more than the larger of—
a. $1,100, or
b. Your earned income (up to $11,850) plus $350.
