how much you want to bet she doesn't release them around April 15, when she said she would. or if she releases her financials, she'll only release some of them.
here's the lowdown from the wash post:
The Clintons stopped disclosing their tax returns after they left the White House in 2000, and their incomes began to soar, with book deals and lecture fees. Hillary did not release her returns during her Senate re-election campaign in 2006. Instead, she pointed to the annual financial disclosure forms that she files as a U.S. senator which are available here and here.
By contrast, Obama has released the form 1040 portion of his tax return (but not the entire return) since he first ran for the Senate from Illinois in 2004. Obama has released all his returns since 2004. Obama's Senate financial disclosure records are available here.
Critics, such as the Wall Street Journal editorial page, argue that disclosure of the tax returns could shed light on how Clinton was able to make a $5 million loan to her campaign last month. They also point out that Bill Clinton has refused to release a list of donors for the Clinton foundation, which funds his Presidential library and other charitable activities.
The Clinton campaign now says that the Clintons will release all her post-White House tax returns "on or around April 15," a week before the potentially crucial Pennsylvania primary.