(a) Base Offense Level (Apply the greater):
(1) Offense level determined from §2T1.1 or §2T1.4, as appropriate; or
(2) 10.
(b) Specific Offense Characteristics
If more than one applies, use the greater:
(1) If the offense involved the planned or threatened use of violence to impede, impair, obstruct, or defeat the ascertainment, computation, assessment, or collection of revenue, increase by 4 levels.
(2) If the conduct was intended to encourage persons other than or in addition to co-conspirators to violate the internal revenue laws or impede, impair, obstruct, or defeat the ascertainment, computation, assessment, or collection of revenue, increase by 2 levels. Do not, however, apply this adjustment if an adjustment from §2T1.4(b)(1) is applied.