If an entity is subject to taxation under this article and is a member of a unitary group of which a taxpayer subject to taxation under IC 6-5.5 is a member, all income and deductions attributable to transactions between the entity and the unitary taxpayer shall be eliminated in determining the amount of tax imposed under this article. This section does not prohibit the elimination of income and deductions between two (2) or more entities that are not members of a unitary group.
IC 6-3-2-16