Or. Admin. Code § 150-317-0140
A corporation excise tax is imposed for the privilege of doing business in Oregon during the year prior to that in which the tax is due and payable. The tax is measured by the corporation's Oregon taxable income as computed in accordance with the provisions of this chapter. A foreign corporation is authorized to do business in this state if it is qualified to do business here. A domestic corporation is authorized to do business if a certificate of incorporation has been issued to it, even though the details of corporate organization have not been completed and no business has been transacted. If a corporation is subject to Oregon jurisdiction and is a part of a unitary group, as defined in ORS 317.705, the determination of the taxable income attributable to Oregon shall be made in accordance with ORS 314.605 to 314.675, 317.705 to 317.720, and the rules thereunder, although the corporation itself may be taxable only by Oregon.
Or. Admin. Code § 150-317-0140
Stat. Auth.: ORS 305.100
Stats. Implemented: ORS 317.070