Should states be able to collect state sales tax on internet purchases and catalogue sales that cross state lines? That's the issue that's currently confronting state governments around the country desperate for revenues in these poor economic times. In theory, it is grossly unfair for a purchase that is made online to be taxed less than an identical item purchased at a "bricks and mortar" store (individuals are technically subject to use tax on their internet purchases but it is almost impossible to enforce). But in practice, taxation of remote sales falls victim to legal barriers as well as decentralized tax policies.
To this day, a company in question must be benefiting from the services which the state provides in order to be subject to sales tax levies. The Due Process clause has been interpreted for tax liability purposes as meaning the state must "give something for which it can ask return." The Supreme Court has ruled that taxation of remote retailers is unconstitutional unless they have nexus or a physical presence within the state's boundaries. But in the era of widespread e-commerce, the lines between a physical and virtual presence are blurring. Companies that buy and sell goods within a state are making use of that state's infrastructure whether or not they physically own operations in the state.
The most recent Supreme Court decision to address this issue, Quill Corp. v. North Dakota in 1992, upheld previous limitations to the circumstances under which the state may collect taxes from a remote retailer. According to the Court, the Dormant Commerce Clause prevents states from placing undue burdens on interstate sales which was violated by North Dakota's sales tax of Quill Corporation. Tax laws are so complicated and widely divergent between the 7,400 tax jurisdictions in the U.S. that the Court ruled it unreasonable for retailers to have to account for all the technicalities. It's important to mention, however, that many observers including the chief executive of Netflix note the improvements in tax software in recent years have dramatically reduced the practical complexity of accounting for different tax policies.
Legal realities haven't kept states from trying to tap this potentially large revenue source, upwards of $18 billion per year according to an estimate from the University of Tennessee. An organization of more than 20 states known as the Streamlined Sales Tax Project (SSTP) created in 2000 has been trying to streamline their tax codes enough so that determining tax liability is less burdensome. This will help convince Congress to change the law and allow states to tax internet sales, bypassing the Court decision. It's probably fair to say they've only had limited success so far. This is due both to the difficulty of adopting a commonly accepted definition of taxable goods and services that doesn't benefit some states while disadvantaging others and the difficulty of getting such a bill through Congress.
Thus presents the Amazon.com dilemma. Its "wholly owned subsidiaries" own thousands of square feet of distribution facilities in several states according to the Wall Street Journal. Although they are legally separate, there is a debate as to whether they constitute a nexus. It's fairly common practice for companies to establish "shell companies" to take advantage of tax loopholes that allow them to expand operations without expanding tax liability. Several states, including Texas, are reviewing whether Amazon's in-state operations should really be exempt from taxation.
Unfortunately, the prospect for expanding the tax base has dimmed as the State Board of Equalization in California has ruled that entities that refer customers by links to Amazon do not trigger nexus under California law. This is true even though the sites benefit financially from their relationship with Amazon, garnering a percentage of the sales made from the sponsored links.
New York has already passed a law requiring remote retailers to collect sales tax on purchases made in the state which Amazon has challenged, saying it unfairly targets Amazon. Amazon has a number of affiliates and advertisers that benefit financially from Amazon sales within the state (other companies such as Overstock.com cut ties to its New York affiliates rather than have to face sales tax liability). New York law states that companies that enter into financial arrangements with Amazon are considered Amazon vendors for sales tax purposes. The question is whether they are acting as agents of Amazon or whether they are primarily out for their own financial interests. It will be up to the courts to decide whether affiliates trigger nexus in New York or whether it's back to the drawing board for advocates of equal tax treatment of e-commerce.