It was a separate event from the many Tax Day protests that peacefully happened in several other cities across the country.
Democratic U.S. Sen. Elizabeth Warren, of MA, on Friday posted an online video urging Congress to force Trump to release the returns.
Across the country, demonstrators took to the streets Saturday to demand that President Donald Trump release his tax returns.
At least 13 people were arrested after violence broke out Saturday between groups of supporters and detractors of President Donald Trump holding rallies in downtown Berkeley, authorities said.
Daryl Tempesta, 52, who said he served in the US Air Force near the end of the Cold War, went to the rally to show his support for Mr Trump. He later said that voters don't care. On either side of the barrier, protesters and counter-demonstrators held two large banners: one reading, "Defend America", and another reading, "Anti-Fascist Anti-Racist". "Rain or shine or fascism, we will be here", said a young woman operating the cash register.
Pushing her walker, Karin Arlin, 85, a Holocaust survivor who came to the USA from Germany when she was 9, said she's also anxious about the direction of the country. Who do you think initiated most of the violence? "I hope Republicans see it".
Two of the biggest tax marches took place in NY and Los Angeles.More news: Israel Seizes 7000 Palestinian prisoners in Jails
In Washington, D.C., one of Trump's sharpest critics in the House spoke to protesters at the U.S. Capitol just before they set off on a march to the National Mall.
"If he thinks he can get away with playing king, he's got another thought coming", Waters said.
At about noon, the protesters began marching down Allston Way, eventually stopping and blocking the road between Milvia Street and Martin Luther King Jr.
The location was witness to a similar development, a month ago on the 4 of March, as the same movements had gathered to express their political will, provoking a similar outcome with 10 people arrested at that time. "This is our stand for peace, and kind of helping people have a chance to feel heard", Mary Goyer with Culture of Empathy said.
Trump, a billionaire property tycoon, released a financial statement but has kept his tax returns private, both during the election campaign and since taking office in January.
Protest organizers say Americans deserve to know about Trump's business ties and potential conflicts of interest. But counter-protesters showed up.