Most Americans spend dozens, if not hundreds, of hours attempting, not always successfully, to do their tax returns. We spend almost $30 billion paying accountants to fill out the complicated forms, and by some estimates we devote $110 billion of our own labor just keeping track of all the necessary records and paperwork. Americans pay about 85 percent of the taxes they owe, better than in most countries, but the shortfall is still a drain on the Treasury (and the rich seem to find a way to avoid taxes legally). Is this costly, demoralizing struggle between the IRS and the rest of us really necessary?

The short answer is no. There is a way to relieve almost all Americans of the annual April 15 nightmare. What's more, it's a necessary first step toward a plan to cut the looming...