"The vast majority of all Americans are honest. Yet Uncle Sam's investigators found arithmetical mistakes totaling nearly $100,000,000 when they checked last year's income tax returns. Altogether, the government recovered more than $1,500,000,000 as a result of checks, audits and prosecutions. So it pays the Internal Revenue Service to take a close look at most income tax returns. Here is the story of what will happen to your return after you address it and mail it before April 15."