If you qualify for 1040EZ, you have the option to file the more complex 1040 if you prefer.
But I've never heard of that site before, so I don't know if they're legitimate, or if they're just a scam designed to collect your personal information for shady purposes. I hope you investigated them first.
Oh my GOD
of course I haven't investigated them becuase I got the link on the IRS.gov website
I though that all these sites for e-filing available on irs.gov are safe ... do I now need to be worry about ID theft?