If you receive money for work, it is taxable.  Depending on how much you make, you may or may not be required to file a tax return.  But, even if not required, many people benefit financially by filing a tax return.  Tax credits for education, deductions, earned income, and over-paying taxes from your paycheck throughout the year could provide a nice refund check once a year.  And, in the past there have been stimulus payments from the IRS for several hundred dollars for tax filers.  The IRS webpage is a valuable resource and surprisingly easy to navigate.  It has everything you need to know, including how to file for free.