Oregon Revised Statutes Revenue and Taxation § 316.119

(a) For the portion of the year in which the taxpayer was a resident of Oregon, the taxpayer's entire adjusted gross income.

(b) For the portion of the year in which the taxpayer was a nonresident, the taxpayer's adjusted gross income derived from sources within this state, as determined under ORS 316.127.

(a) The total amount of the item that is taken into account in federal adjusted gross income, multiplied by the ratio of the number of days the taxpayer was a resident of Oregon during the tax year of the entity over the total number of days in the tax year of the entity; and

(b) The total amount of the item that is taken into account in federal adjusted gross income and that is derived from or connected with sources within this state, as determined under ORS 316.127, multiplied by the ratio of the number of days the taxpayer was a nonresident of Oregon during the tax year of the entity over the total number of days in the tax year of the entity.

(a) “Pass-through entity” means any entity that is recognized as a separate entity for federal income tax purposes, for which the owners are required to report income, gains, losses, deductions or credits from the entity for federal income tax purposes.

(b) “Tax year of the entity” means the tax year of the pass-through entity that ends within the tax year of the taxpayer.