Question: what are the requirements for filing taxes?
Answer: Single: $12,200 if under age 65. $13,850 if 65 and older. Married filing jointly: $24,400 if both under 65. ...  Married filing separately — $5 at any age. Qualifying widow(er) with a dependent child: $24,400 if under 65. ...  Head of household: $18,350 if under 65.