The most innovative tax-filing nudge is California’s Ready Return, a free, voluntary service that allows people to download a pre-filled tax return using information from their W-2s and previous year’s filing. Ready Return began as a small pilot program three years ago, but was halted because of business lobbying pressure. Now, Ready Return is back. Unfortunately, thanks to paltry publicity, few Californians, let alone other Americans, know about it. In the interest of tax filing headaches everywhere, we hope that this will soon change.