Why Filing Income Taxes Online Beats Snail Mail

In the United States the number of taxpayers who file their income taxes online has risen dramatically, and many first time e-filers are discovering that there are many advantages to doing taxes online as opposed to filing the traditional method of snail mail. They are much more secure, as well, since the information online is encrypted and sent to the IRS, who are the only ones able to unscramble the data to read it, while an envelope in the mail can pass through several strangers' hands.

Source: Taxes