如果五年内有三年亏损，麻烦比较大。

Filing a business return. Although there are plenty of legitimate businesspeople who file Schedule C forms, a handful treat tax time like a hunt for loopholes and give everybody else a bad name. As a result, the IRS often scrutinizes business returns more closely, says Steber. An even bigger red flag is if you lose money consistently, says Levit. “The rule of thumb I’d always use is, if you’re running a loss three out of five years, it starts to get questionable.” This could prompt the IRS to ask you to prove that your business is a bona fide enterprise and not just a hobby.

Read more: http://moneyland.time.com/2012/04/06/7-red-flags-that-can-get-you-audited/?xid=rss-topstories#ixzz1rawsqRUE