Another lawsuit has been filed seeking to block Elon Musk‘s Department of Government Efficiency from accessing government data.

A collection of groups, including two government employee unions, the Center for Taxpayer Rights, and Main Street Alliance, filed an emergency lawsuit late Monday seeking to block DOGE from accessing tax records at the IRS.

The groups are asking a judge to block what they describe as “unfettered and lawless access to personal data at levels that far exceed those experienced since Watergate” that could “endanger the privacy of hundreds of millions of Americans.”

“The efficiency and effectiveness of our system is dependent upon taxpayers’ trust that the information they voluntarily provide the IRS will be held confidential,” said Nina Olson, executive director of the Center for Taxpayer Rights. “Allowing DOGE unfettered access to the sensitive data held by the IRS is a violation of both the rights of all taxpayers and their trust.”

DOGE has been on the receiving end of several lawsuits since President Donald Trump took office less than one month ago. Most of them center on the same problem — whether or not his quasi-government agency can access government data. In a separate suit, 14 Democratic state attorneys say that giving DOGE access to government data is unconstitutional.

Musk has acted with breathtaking speed as he seeks to cut what he describes as trillions of dollars of government waste, which has drawn blowback from Democrats and labor unions.

The IRS is DOGE’s latest target.

DOGE is requesting access to the IRS Integrated Data Retrieval System, which contains personal tax information for millions of people.

IRS employees use the system to review tax information, update taxpayer records, and issue notices. The inquiry itself has set off more alarm bells about privacy problems and potential data breaches, though Musk maintains there may be corruption within the agency.

“We do find it rather odd that there are quite a few people in the bureaucracy who have ostensibly a salary of a few hundred thousand dollars but somehow managed to accrue tens of millions of dollars in net worth while they are in that position,” Musk said last week while in the Oval Office with Trump. “We’re just curious as to where it came from.”

Musk first caused a stir when DOGE demanded access to the Treasury Department’s payment system. Democrats used the situation to push strong messaging that an unelected billionaire is looking to access the private information of hardworking people.

In the IRS lawsuit, the plaintiffs say that DOGE would have access to confidential business information, IRS investigations, Social Security numbers, bank account information, and, in some cases, the tax records of Musk’s business competitors.

“When small business owners pay their taxes they expect that data to be safe, secure and to be reliable,” Main Street Alliance campaigns director Shawn Phetteplace said. “DOGE is none of those things.”

In the suit, filed in the U.S. District Court for the District of Columbia, the IRS itself is named as a defendant, along with acting IRS commissioner Douglas O’Donnell, the Treasury Department, Treasury Secretary Scott Bessent, and DOGE.

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Trump maintains that Musk is not making decisions on his own and is acting with the president’s approval, though ethics experts have raised flags about their arrangement.

The Washington Examiner has contacted the White House seeking comment.