Sanders declared his soon-to-be released tax returns would be "boring" and didn't deny his millionaire status in an interview with the New York Times.
"If you write a best-selling book, you can be a millionaire, too", he said.
Sanders had been promising to release a decade's worth of tax returns for more than a month.
USA plans $11bn tariffs on European aircraft, wine and cheese
US officials have repeatedly expressed frustration at the slow pace of the talks. Airbus shares closed down almost 2 percent, while Boeing dropped 1.4 percent.
SANDERS: If you want cosmetic surgery - under Medicare for all, we cover all basic health care need. Bernie Sanders (I-Vt.) on Monday, April 15, from 6:30 to 7:30pm ET in Bethlehem, Pennsylvania.
The runner-up for the 2016 Democratic presidential nomination and the frontrunner in the race in 2020 has made a name for himself decrying the excesses of millionaires and billionaires, but has recently become a millionaire himself. "We wanted to release 10 years of tax returns".
Sanders bristled at comparisons to Trump, who has famously refused to release his returns. "We are going to release 10 years of our tax returns, and we hope that on that day Donald Trump will do the same". Kirsten Gillibrand (D., N.Y.) and Amy Klobuchar (D., Minn.), and Sen. Senators Elizabeth Warren of MA and Kirsten Gillibrand of NY have both released a decade of their own returns. He has said he and his wife, Jane, who serves as an adviser to his presidential campaign, prepare the returns themselves, without an accountant. But that was criticized as not a full disclosure. His Senate salary is $174,000 per year. He published another book, Where We Go From Here, in 2018.