JM 6-4.010
The Government helps to preserve the integrity of this Nation's self-assessment tax system through vigorous and uniform criminal enforcement of the internal revenue laws. Criminal prosecutions punish tax law violators and deter other persons who would violate those laws. To achieve maximum deterrence, the Government must pursue broad, balanced, and uniform criminal tax enforcement. Uniformity in tax cases is necessary because tax enforcement potentially affects more individuals than any other area of criminal enforcement. Broad and balanced enforcement is essential to effectively deter persons of varying economic and vocational status, violators in different geographic areas, and different types of tax law violations.
To achieve uniform, broad, and balanced criminal tax enforcement, the Attorney General has authorized the Tax Division to oversee all federal criminal tax enforcement and to authorize or decline investigations and prosecutions in tax matters. See JM 6-4.200. For a map reflecting the geographical assignments of the Tax Division Criminal Enforcement Sections, see here. For contact information, including mailing addresses and telephone and fax numbers, see Criminal Tax Manual 1.13.
[updated June 2020] [cited in JM 6-4.211]