Your chances of being audited are fairly small. The IRS randomly reviews a small percentage of returns regardless of audit risk. Additionally, the IRS's focus on audit risk factors changes periodically and is not made public.
According to the IRS, of the nearly 141 million individual returns filed for fiscal year 2011, 1.1 percent were audited.
See this IRS website for audit information - https://www.irs.gov/businesses/small-businesses-self-employed/irs-audits
There is difference between receiving an Audit notice and receiving an IRS Notice or Letter. An IRS notice or letter can be for a multitude of reasons concerning the tax return that has been filed with the IRS. See this IRS website - https://www.irs.gov/uac/newsroom/if-you-receive-an-irs-notice-heres-what-to-do
For more information - Top Five Ways to Avoid a Tax Audit: https://turbotax.intuit.com/tax-tips/tax-planning-and-checklists/top-five-ways-to-avoid-a-tax-audit/...
