The IRS audits about one million taxpayers each year. While the agency is understaffed, that doesn’t mean you’ll slip through the cracks. IRS software automates the selection process now by flagging returns that show abnormalities: Perhaps the return deviates from what’s normally filed, or it’s been linked to a family member, investor, or business partner who is being audited. Also, the more money you make, the more likely you are to be audited.