If you live in Illinois and you get an IRS audit letter, it can feel like the ground drops under you. Most of the time, though, an audit is simply the IRS asking you to prove a few numbers on your return. It is usually not personal, and it is often fixable with clear paperwork and a calm plan. National audit rates for individual returns are generally low, often well under 1 percent in many years, but some returns still get pulled for review. The best approach is to respond on