The Main Street Fairness Act
There are two primary strategies that states are pursuing to move toward a level playing field in which all retailers are subject to the same sales tax requirements.
One involves persuading Congress that collecting sales taxes for numerous state and local jurisdictions is no longer a burden for remote sellers. As noted above, software makes complying with state and local sales tax rules much simpler than when the Supreme Court issued its 1992 ruling.
To further simplify things, the National Governors Association established the Streamlined Sales Tax Project, a multi-state effort to simplify and align sales tax policies. As of July 2010, 44 states and the District of Columbia had approved an interstate agreement that establishes uniform sales tax rules and definitions, and 24 states had taken the next step of passing implementing legislation. Those 24 states are: Arkansas, Georgia, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Nebraska, Nevada, New Jersey, North Carolina, North Dakota, Ohio, Oklahoma, Rhode Island, South Dakota, Tennessee, Utah, Vermont, Washington, West Virginia, Wisconsin, and Wyoming.
Under this legislation, states and cities still have the authority to determine what goods are taxed at what rate, but must adhere to rules governing such things as how and when they can change tax rates, as well as uniform definitions (e.g., whether marshmallows are considered food or candy for tax purposes).
Having aligned and greatly simplified their sales tax policies, states are hoping to persuade Congress to pass the Main Street Fairness Act.
The bill would authorize those states that have implemented the Streamlined Sales Tax to require large online and catalog retailers to collect sales taxes. (Small online and mail order retailers would still be exempt.)
http://www.newrules.org/retail/rules/internet-sales-tax-fairness