You might or might not get a refund. It depends on how much income you have and how much tax you have withheld. If you do get a refund, you will get it, not your mother. It's your money, not hers. Your tax and hers are not combined, even if she claims you as a dependent.
Keep in mind that a tax refund is not a gift from the government. It's exactly what the word says, a refund of money that you paid. You get a refund if you paid more tax than necessary during the year. You are letting the government hold your money and send it back to you after the end of the year. If the final tax on your tax return is less than you had withheld from your pay during the year, the government sends your excess payment back to you.
