The details published about Donald Trump's tax returns were a revelation to the public but not to a small group of attorneys who work for a little-known congressional panel. Trump has been in the middle of a dispute with the Internal Revenue Service over a 2010 claim of a $72.9 million tax refund, according to the New York Times, which obtained more than 20 years of the president's tax data. The size of the refund claim brought it before the Joint Committee on Taxation. The joint committee's role reviewing tax refunds goes back to 1927, one year after the committee was formed, said George Yin,...