Contrary to what you may have heard, the Internal Revenue Service does not know much about your business when they ask for an audit. A few of the agents may have limited knowledge about the specific audit issues that pertain to your type of business. Usually, there has been no glaring error to trigger an audit. For instance the Internal Revenue Service representative knows want you do for a living but does not know how your business is run. Given there are so many businesses in our country, it is impossible that the Internal Revenue Service can know the details of each business. To say that you are paying only 1% or 10% of your gross income is misleading. In short you are the one that can advise the Internal Revenue Service of the true facts of your business.
If you have given an opportunity to tell the Internal Revenue Service about your business (yes, an IRS business audit can be a blessing), then you should benefit from it. You can take advantage of the situation, which can possibly result in a limited access to your financial records ensuring a good audit result in the end.