Gov. Pat Quinn is the latest Illinois official to disclose his tax returns. They show he paid about $29,000 federal taxes, $7,700 in taxes to the state. Still, a lot of information about politicians' finances can remain hidden.
There's no law requiring politicians make their tax returns public, though they often do.
Lt. Gov. Sheila Simon says that's a positive thing.
"I think it shows that people are demanding more disclosure," she says.