The thing is, the IRS would happily issue the third degree to every tax return that came in. They make a lot more money this way. The only problem is that they don't have enough people to do the dirty work for them. They are somewhat short-staffed. Only one in a hundred tax return is actually flagged for an IRS audit. But is there some kind of reason why those people get caught instead of everyone else? Well, let's see, shall we?
With only 1% of all taxable public seeing their names come up for an IRS audit, you mustn't really worry about getting caught like it's about to happen tomorrow. If you really, really want to avoid an audit, you need to build a plan to make it happen.