Advocate staff photo by BILL FEIG -- As Revenue Secretary Kimberly Robinson, left, and Administration Commissioner Jay Dardenne, right, watch Gov. John Bel Edwards answer questions during a press conference after a special legislative session in early 2016. Edwards is urging the Legislature to tackle a more ambitious reform of Louisiana's tax code when this year's regular session begins next month, including a plan to replace the corporate tax on profits with a corporate tax on sales.