A mix-up at the loading dock of a paper-shredding company led to original copies of tax returns being used as the material for some of the confetti flung by fans during the recent Kansas City victory parade for the Kansas City Royals, winners of the 1985 World Series. Several boxes of “roughly torn” tax forms, which had been awaiting shredding, had accidentally been loaded onto a truck that had stopped at the shredding company to pick up boxes of confetti. Richard Williams, a Southwestern Bell employee from Prairie Village, reported that a five-inch-square piece of his 1981 federal tax return had been found after the parade. Officials were quoted as saying that here was no way to know how many forms had gotten mixed in with the confetti. “We feel so bad about it,” said the manager of the shredding company. “We just screwed up.” H&R Block, whose records were in the boxes, also said that they deeply regretted the incident.