The IRS on Monday removed the “entire investigative team” from its long-running tax fraud probe of first son Hunter Biden in alleged retaliation against the whistleblower who recently contacted Congress to allege a cover-up in the case, The Post has learned.

The purge allegedly was done on the orders of the Justice Department, the whistleblower’s attorneys informed congressional leaders in a letter.

“Today the Internal Revenue Service (IRS) Criminal Supervisory Special Agent we represent was informed that he and his entire investigative team are being removed from the ongoing and sensitive investigation of the high-profile, controversial subject about which our client sought to make whistleblower disclosures to Congress. He was informed the change was at the request of the Department of Justice,” Mark Lytle and Tristan Leavitt wrote.

The whistleblower, who supervised the Hunter Biden probe since early 2020, hasn’t publicly identified the first son as the subject of the case that he says is being brushed under the rug, but congressional sources confirmed it.

“On April 27, 2023, IRS Commissioner Daniel Werfel appeared before the House Committee on Ways and Means. He testified: ‘I can say without any hesitation there will be no retaliation for anyone making an allegation or a call to a whistleblower hotline.’ However, this move is clearly retaliatory and may also constitute obstruction of a congressional inquiry,” the lawyers went on.