Didn’t work last year, do I still need to file a tax return
"...didn't work" but did you receive any other income? Unemployment? Social Security? Retirement income? Rental income? Investment income?
Who has to file?
http://www.irs.gov/uac/Do-I-Need-to-File-a-Tax-Return%3F
If you have no income other than social security or welfare benefits, then no, you would not need to file.
If you have investment income, unemployment, rental properties, pensions, 401K or retirement distributions, or other taxable income, then yes.