So there you go.
Today, Hillary Clinton released her 2015 personal tax return and Senator Tim Kaine and his wife, Anne Holton, released 10 years of their returns.
The 2015 return completes the set; the Clintons have now publicly released every tax return since 1977. Meanwhile, Donald Trump says he won't be releasing any, because he's afraid the press might use them to make him look bad. Or, more likely, because they would show he’s not worth anything even close to “ten billion dollars.”
He really has no interest in being president. I don't know how he could make it any clearer.
As for the Democratic candidates, you can find their released documents here.