JM 6-4.360
While statutory authority under 26 U.S.C. § 7122(a) does exist for the Attorney General, after referral of a case to the Department, to enter into agreements to compromise criminal tax cases without prosecution, as a matter of longstanding policy, such authority is very rarely exercised. If, consistent with the Principles of Federal Prosecution, it is concluded that there is a reasonable probability of conviction and that prosecution would advance the administration of the internal revenue laws, any decision to forgo prosecution on the ground that the taxpayer is willing to pay a fixed sum to the United States, would be susceptible to the attack that a taxpayer who is able to pay whatever amount of money the government demanded had been given preferential treatment.
Consequently, proposed criminal tax cases are reviewed without any consideration being given to the matter of civil liability or the collection of taxes, penalties, and interest. In short, proposed criminal tax cases are examined with the view to determining whether a violation has occurred, to the exclusion of any consideration of civil liability.
Absent extraordinary circumstances, such as permanent loss of tax revenues unless immediate protective action is taken, settlement of the civil liability is postponed until after sentence has been imposed in the criminal case, except when the court chooses to defer sentencing pending the outcome of such settlement. In this event, the IRS should be notified so that it can begin civil negotiations with the defendant.
However, the Tax Division strongly encourages, but does not require, that a plea agreement include certain civil admissions by the defendant, including: (1) admission of either receipt of enumerated amounts of unreported income or claimed enumerated amounts of illegal deductions or improper credits for years set forth in the plea agreement; (2) a stipulation that defendant is liable for the fraud penalty imposed by the Internal Revenue Code (26 U.S.C. § 6663) on the understatements of liability for the years involved; and (3) an agreement by the defendant to file, prior to sentencing, complete and correct initial or amended personal returns for the years subject to the above admissions and, if requested, to provide the IRS with information regarding the years covered by the returns and to pay, at sentencing, all additional taxes, penalties and interest which are due and owing; and (4) an agreement by the defendant not to file any claims for refund of taxes, penalties, or interest for amounts attributable to the returns filed incident to the plea.
[updated February 2018] [cited in JM 6-6.200]