In 2013, I reported my 2012 tax using www.freefilefillableforms.com, promoted by IRS.
This year for 2013 tax report, I noticed that IRS says to use Free File Fillable Form when Income is above $58,000 (see http://www.irs.gov/uac/Free-File:-Do-Your-Federal-Taxes-for-Free). Otherwise, there are other online ways to report tax for free.
I didn't see that I can't use Free File Fillable Form when my income is below $58,000 at http://www.irs.gov/uac/Free-File-Fillable-Form-Constraints. Or did I miss something?