The incredible shrinking internet sales tax loophole

But those tax breaks are starting to erode. With the recession pummeling states' budgets, their governments increasingly want to fill the gaps by collecting taxes on Internet sales, which are growing even as the economy shudders.

And that is sparking conflict with companies that do business online only and have enjoyed being able to offer sales-tax free shopping.

One of the most aggressive states, New York, is being sued by Amazon.com over a new requirement that online companies must collect taxes on shipments to New York residents, even if the companies are located elsewhere. New York's governor also wants to tax "Taxman" covers and other songs downloaded from Internet services like iTunes.

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