Though the tax season is over, it doesn’t mean that you’ll also stop thinking about your taxes. In fact, small business owners, especially sole proprietors, are particularly at risk of being audited by the Internal Revenue Service (IRS). This is because the IRS believes self-employment incomes are grossly under reported, according to experts. That's why, even though the tax season is over, now is still a great time to make sure your tax planning strategy is solid and know how to avoid an audit.