Odds of Getting In
The demand for tax specialists like IRS Auditors is growing—albeit a little more slowly than the average job market. The positive side is that the nation—and the government that taxes it—continues to grow at a steady rate, which means fairly steady prospects for would-be agents. Add this growth to the fact that the nation's federal, state, and local tax codes continue to grow more and more complicated, and an IRS auditor who knows the ropes can be pretty well assured of a position.
Your odds of getting hired increase significantly the more relevant (scooping ice cream or salting fries isn't relevant—though it is tasty) experience you have. Even if you can't work under an IRS Auditor, work with an accountant, bank, CPA, or any experience with numbers can be a valuable tool in your agent belt.