If you don't have children or dependents, make less than 100K a year, don't own real estate and have income rolling in only from W-2 forms, interest or unemployment, TurboTax SnapTax is the absolute easiest way to file your taxes electronically--as long as you have an iPhone or Android smartphone.
The app essentially holds your hand through the process of submitting a 1040EZ form, even showing you how to rip your W-2 to get just the portion of the page that you need. Then, simply line up the frame and use your smartphone's camera to snap a photo. The app slurps your information, asks you a few painless questions and shoots everything over to the IRS.
While the app is free to download, it costs $24.99 to e-file (prices vary on the desktop version). It's not a big change from last year's version, but this iteration gives you the option to try out the app without signing up for an account. Afterward, it holds your information for an hour in case you want to go through with the process.