More than 27 million taxpayers already have filed their taxes for 2013 from home computers, a process known as e-filing. As of this week, that's up 6 percent from 2012.
But the convenience of electronic filing also allows cybercriminals to file fraudulent tax returns—undetected—to the tune of $3.6 billion for tax year 2011, according to the most recent review by the Treasury Inspector General for Tax Administration.
Here's how to protect yourself when electronically filing taxes, according tocybersecurity experts CNBC interviewed. Read more.