If you are a U.S. citizen or resident alien, whether you must file a federal income tax return depends on your gross income, your filing status, your age, and whether you are a dependent. For details, see Table 1 and Table 2. You must also file if one of the situations described in Table 3 applies. The filing requirements apply even if you owe no tax.
Table 1. 2019 Filing Requirements Chart for Most Taxpayers