Yes, you really can file your taxes on your smartphone. But should you? TurboTax's SnapTax 2012 (*Est. $25 to e-file (free download)) promises to do your taxes in 10 minutes. Snap a photo of your W-2, answer a few simple questions -- you're done. H&R Block 1040EZ for Smartphone (Free download and e-file) works the same way. "But how good are they?" asks Salvador Rodriguez at the L.A. Times. "Can users file their federal taxes with just a few taps on 4-inch screens?" Let's take a look:read more