Historic American Buildings Survey, Creator, and John Magruder. Dunblane, Westphalia Road, Forestville, Prince George's County, MD. Forestville Maryland Prince George's County, 1933. Documentation Compiled After. Photograph. Retrieved from the Library of Congress, https://www.loc.gov/item/md0522/.
If you are 65 or older, your gross income needs to be $13,950 or more for you to file. If you are a widow/widower with dependent children you would qualify to file taxes if you are younger than 65 with a gross income of $15,700 or more.
If you like to keep your taxes simple, you can claim the standard deduction. For the 2014 tax year, for which you'll file a return in 2015, it lets a single person subtract $6,200 right off the top of his income. This means that if you make $24,000 per year, the standard deduction reduces your taxable income to $17,800.