Who must file a tax return?

Filing Status Must file if gross income is at least:
      2002   2003
Single:
  Under 65 $ 7,700 $ 7,800
  65 or older $ 8,850 $ 8,950
Married Filing Jointly: *
  Both spouses under 65 $ 13,850 $ 15,600
  One spouse 65 or older $ 14,750 $ 16,550
  Both spouses 65 or older $ 15,650 $ 17,500
Married Filing Separately: $ 3,000 $ 3,050
Head of Household:
  Under 65 $ 9,900 $ 10,050
  65 or older $ 11,050 $ 11,200
Qualifying Window(er):
  Under 65 $ 10,850 $ 12,550
  65 or older $ 11,750 $ 13,500
Married Living Apart at end of 2002: $ 3,000 $ 3,050

* Filing floors for join returns apply only if the spouses lived together at the end of 2003 and neither spouse is claimed as a dependent on another return.