Amid increasing pressure to release his tax returns, presidential candidate Mitt Romney disclosed the documents late Monday night.

The former Massachusetts governor had an effective tax rate of 13.9 percent in 2010, a rate that is lower than the 26 percent paid by President Obama and the 31.6 percent rate paid by Newt Gingrich.

Romney’s full 2010 tax return is available below. It offers a glimpse at just how much he brought in, how he earned it, and what charitable donations he made.

Washington Post staff writer Jia Lynn Yang has annotated the 2010 document with explanations of what each line item means and why it matters.

Help us continue annotating both documents by sharing which passages you find most interesting or significant and why in the comments section.

The tax returns can viewed here:

Romney's 2010 tax return (full text)

Romney’s estimated 2011 filing (full text)