The United States Supreme Court recently decided to revisit Quill Corp. v. North Dakota, which basically allowed states to collect taxes on online sales only from sellers that had a physical presence within their boundaries. Brick-and-mortar retailers for years have argued that the ruling puts them at a competitive disadvantage. At least 35 states have been urging a reconsideration of Quill on the grounds that they're losing out on collecting taxes, and last year's record online holiday sales figures lent strength to their calls.