In the past year, Dallas attorney Dennis Drapkin has had a view of the Internal Revenue Service that few have had. As chairman of the American Bar Association's taxation section, Mr. Drapkin represented the nation's tax lawyers before Congress and the IRS. "It was fabulous, just absolutely fabulous," said Mr. Drapkin, a partner at Jones Day in Dallas. "There were many issues that had to be addressed by the tax section." .