By 2014, Internet sales are estimated to reach almost $250 billion a year, says Forrester Research. And for some of the Internet’s largest retailers, many of those sales take place without the customer paying state sales taxes. That’s a big chunk of revenue states are trying to figure out how to capture with, so far, little success. As state budget crises have deepened, many policymakers have looked toward enacting so-called “Amazon laws,” named after the Internet’s retail giant. While states already have well-established rules regarding tax collection for bricks-and-mortar stores, online-only retailers have proved to be a trickier nut to crack.