The income from translation service could be filed as income from your small business, I guess. Then you will need to pay self-employment tax.
However, given the total earned income and your family situation, you will probably get a tax refund over 2000 dollars. I know a babysitter (she is a legal PR) who has a son in College as dependent, she files a return with 9000 business income from babysitting ... and get 2700 through EIC. You can use the free tax filing service to get a faster refund.