Biden's last financial disclosure, filed in 2016 during his final year as vice president, showed that even after eight years at his $230,000-a-year government salary, Biden held significant personal debt.
The documents released Tuesday offered a comprehensive view of Biden's finances since he left office in January 2017.
Biden's campaign noted that he released 10 years' worth of tax returns during the 2008 election cycle - in addition to regular releases while serving as vice president - which means 21 years' worth of returns are available to the public.
Senator Bernie Sanders, the self-described Democratic socialist and champion of the working class who is roughly tied with Harris for second in polling, listed $561,293 in income for 2018.
According to the couple's tax returns, they paid $3.7 million in federal taxes in 2017 and donated about $1 million to charity. That's according to tax returns and other financial disclosure forms released by Biden's campaign on Tuesday. Joe Biden is also expected to write another book under the three-book deal with Flatiron Books, a division of Macmillan Publishers.
Biden's disclosure showed that he also made at least $2.7 million in business income as part of his publicity tour and writing and took a $425,000 salary from CelticCapri Corp., the business entity the Bidens used for their post-White House work.
The next year, they claimed more than $1 million in charitable giving, including $100,000 to the Joseph Biden Foundation and $150,000 to the Beau Biden Foundation for the Protection of Children and $25,000 to the Human Rights Campaign Foundation.
The former United States senator from DE served as Obama's vice president for 8 yrs, leaving office in Jan 2017 after the election of Trump.
Presidential candidates typically don't release their tax returns until they've become their party's nominee. The highest was a 2017 "VIP Experience" for $234,820. Jill Biden taught at Northern Virginia Community College and made more than $180,000 in two years, while her husband was named the "Benjamin Franklin presidential practice professor" at the University of Pennsylvania, earning more than $775,000 in two years. During this time, Jill Biden pulled in more than $700,000 for speaking engagements.