I have used FreeTaxUSA for federal taxes since 2008 and for federal and state taxes since 2009. Until the 2013 tax year, I absolutely LOVED it - so practical and easy for simple return! However, for 2013, I filed on 2/8/2014 and received their confirmation that the IRS had accepted my return. A confirmation number was provided. Later, I submitted a request to the IRS for a transcript of my 2013 taxes to use for my child's student financial aid, and after two requests, the IRS says it has never received my return.
I contacted FreeTaxUSA via their website and I received a timely response stating that I should not mail my tax return to the IRS because it would be rejected as duplicate, along with a comment as to how I can print a copy of my return. This was not helpful.
As I write this, I am on hold with the IRS Accounts department (*******040). Hopefully, an IRS agent will help me resolve this mess.
Bottom line: FreeTaxUSA is great as long as you don't need support, so be aware.