The obligation to pay US taxes isn't related to whether you're in the country on a valid visa or not. The family you work for should have given you a Form W-2. That contains all the information you need to file your taxes. Take an hour and fill out the tax form on TurboTax (it should be free). You might have to file it by mail because the password to access email filing comes from your return from last year and you probably didn't file last year.
Answered on Feb 13th, 2015 at 5:53 PM