Question: what is the maximum income to not have to file a tax return?
Answer: Single filing status: $12,200 if under age 65. $13,850 if age 65 or older.
Married filing jointly: $24,400 if both spouses under age 65. ... 
Married filing separately — $5 for all ages.
Head of household: $18,350 if under age 65. ... 
Qualifying widow(er) with dependent child: $24,400 if under age 65.