The IRS audits about 1 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.