A Treasury Department inspector general is probing efforts by President Donald Trump and Elon Musk’s Department of Government Efficiency to obtain private taxpayer data and other sensitive information, internal communications reviewed by ProPublica show.

The office of the Treasury Inspector General for Tax Administration has sought a wide swath of information from IRS employees. In particular, the office is seeking any requests for taxpayer data from the president, the Executive Office of the President, DOGE or the president’s Office of Management and Budget.

The request, spelled out in a mid-April email obtained by ProPublica, comes as watchdogs and leading Democrats question whether DOGE has overstepped its bounds in seeking information about taxpayers, public employees or federal agencies that is typically highly restricted.

The review appears to be in its early stages — one document describes staffers as “beginning preplanning” — but the email directs the IRS to turn over specific documents by Thursday, April 24. It’s not clear if that happened.

The inspector general is seeking, for instance, “All requests for taxpayer or other protected information from the President or Executive Office of the President, OMB, or DOGE. Include any information on how the requestor plans to use the information requested, the IRS’s response to the request, and the legal basis for the IRS’s response,” the email says.

The inquiry also asks for information about requests for access to IRS systems from any agency in the executive branch, including the Department of Homeland Security, the Social Security Administration and DOGE.

The Treasury Inspector General for Tax Administration office, known as TIGTA, is led by acting Inspector General Heather M. Hill. When Trump fired 17 inspectors general across a range of federal agencies in January, those working for the Treasury Department were not among the ones axed.

The White House, DOGE, OMB and Musk did not respond to requests for comment Friday.

Previously, the administration has said, “Those leading this mission with Elon Musk are doing so in full compliance with federal law, appropriate security clearances, and as employees of the relevant agencies, not as outside advisors or entities.”

A TIGTA spokesperson, Becky D’Ambrosio, said the agency “does not disclose specific details of ongoing work or timelines.” She said the office has received multiple requests from Congress. “When possible, we are incorporating these requests into our ongoing work providing independent oversight of IRS activities.”

The April 15 request follows concerns expressed by some within the IRS that DOGE employees under Musk’s direction have improperly accessed taxpayer information or shared it with other government agencies, said multiple people familiar with the matter who spoke on the condition of anonymity for fear of retaliation.

Earlier this month, a group of Democratic senators urged the Treasury inspector general to investigate whether the Trump administration was “violating strict taxpayer privacy laws” by giving DOGE personnel wide access inside the agency.

“Taxpayer data held by the IRS is, by design, subject to some of the strongest privacy protections under federal law, the violation of which can trigger civil and criminal sanctions,” the lawmakers wrote in their request.

In March, three senators said they were troubled by reports the IRS had entered into a sharing agreement to help the Department of Homeland Security “locate suspected undocumented immigrants.” Trump has promised deportations on a massive scale.

A spokesperson for Sen. Ron Wyden, one of the signees of both requests, declined to comment. DHS referred a request for comment from ProPublica to the Treasury Department, which did not respond.

The inspector general examination comes amid major upheaval at the Treasury Department and the IRS, as the administration moves to fire thousands of agency workers and DOGE digs deeper into IRS databases. Melanie Krause resigned as the acting commissioner of the IRS after the agency reached an agreement to share taxpayer data with the DHS.

A former senior official at TIGTA told ProPublica the review could lead to a criminal investigation if reviewers find evidence of lawbreaking. The same official said it’s possible those leading the review could face political repercussions, as have scores of prosecutors, FBI agents, law firms and others who have questioned Trump’s actions.

Emails from the inspector general to IRS employees earlier this month asked them to provide copies of any written agreements to share taxpayer data with entities including the Department of Homeland Security, the Social Security Administration, DOGE, the Office of Personnel Management or other agencies.

It also seeks a full list of non-IRS employees who are part of DOGE or its affiliates. This year, ProPublica has been profiling the figures working for DOGE.

Danielle Citron, a leading privacy legal scholar at the University of Virginia, said the email suggests that the inspector general may be probing for violations of the Privacy Act, which requires agencies to safeguard citizens’ information and only share it across the government in specific cases. The kind of blanket data-sharing agreement the Trump administration is seeking with the IRS, she said, is “exactly what the Privacy Act is designed to avoid.”

CNN and Wired have reported that DOGE is attempting to build a master database that combines information from the IRS, DHS, Social Security Administration and other agencies. The database would be used for immigration enforcement, the outlets reported.

This is not the first time Trump administration decisions at the IRS have prompted an inspector general inquiry.

As ProPublica reported, a senior IRS lawyer warned the agency’s leaders in late February that its plan to terminate nearly 7,000 probationary employees based on poor performance was untrue and a “fraud.” The IRS proceeded with the firings, which have since been challenged in federal court.

After the firings, the IRS inspector general began scrutinizing the mass terminations, said a person familiar with the effort who wasn’t authorized to speak with reporters. The status of the probe is not known.