WASHINGTON — Senator Elizabeth Warren of Massachusetts disclosed her 2018 tax returns on Wednesday, showing that she earned about $325,000 from her books last year on top of her Senate salary.
Ms. Warren had previously posted 10 years of her tax returns online, and she has called on her fellow presidential candidates to do the same thing. She has proposed a wide-ranging anticorruption bill that would require the disclosure of tax returns for the president, vice president and major party nominees for those offices.
President Trump has refused to share his tax returns, defying tradition going back decades. The issue of his tax returns is back in the spotlight now that House Democrats have requested them.
“I’ve put out 11 years of my tax returns because no one should ever have to guess who their elected officials are working for,” Ms. Warren said in a statement on Wednesday. “Doing this should be law.”
Over all, Ms. Warren and her husband, Bruce H. Mann, a professor at Harvard Law School, had an adjusted gross income of $846,394. Their federal taxes came to $230,965, for an effective federal tax rate of 27.3 percent.
A rough estimate of Ms. Warren’s income from writing books had already come into public view from the financial disclosure filing that she made after entering the presidential race. That filing showed that she received a $300,000 advance for her latest book, “This Fight Is Our Fight.”
In addition to $324,687 in writing income reported on her tax return, Ms. Warren earned $176,280 from her Senate position. Mr. Mann earned $402,897 from Harvard. Ms. Warren and Mr. Mann reported donating $50,128 to charity.
Ms. Warren is among several Democratic presidential candidates who have disclosed years of tax returns. Senator Kirsten Gillibrand of New York, Senator Amy Klobuchar of Minnesota and Gov. Jay Inslee of Washington have also done so.
Another presidential contender, Senator Bernie Sanders of Vermont, said on Tuesday that he would make public 10 years of tax returns by Tax Day on Monday. He, too, has supplemented his Senate salary with income from writing books.
“I wrote a best-selling book,” he said. “If you write a best-selling book, you can be a millionaire, too.”