Oregon Revised Statutes Revenue and Taxation § 305.280

(1) Except as otherwise provided in this section, an appeal under ORS 305.275 (1) or (2) shall be filed within 90 days after the act, omission, order or determination becomes actually known to the person, but in no event later than one year after the act or omission has occurred, or the order or determination has been made. An appeal under ORS 308.505 to 308.681 shall be filed within 90 days after the date the order is issued under ORS 308.584 (3). An appeal from a supervisory order or other order or determination of the Department of Revenue shall be filed within 90 days after the date a copy of the order or determination or notice of the order or determination has been served upon the appealing party by mail as provided in ORS 306.805.

(2) An appeal under ORS 323.416 or 323.623 or from any notice of assessment or refund denial issued by the Department of Revenue with respect to a tax imposed under ORS chapter 118, 308, 308A, 310, 314, 316, 317, 318, 321 or this chapter, or collected pursuant to ORS 305.620, shall be filed within 90 days after the date of the notice. An appeal from a proposed adjustment under ORS 305.270 shall be filed within 90 days after the date the notice of adjustment is final.

(3) Notwithstanding subsection (2) of this section, an appeal from a notice of assessment of taxes imposed under ORS chapter 314, 316, 317 or 318 may be filed within two years after the date the amount of tax, as shown on the notice and including appropriate penalties and interest, is paid.

(4) Except as provided in subsection (2) of this section or as specifically provided in ORS chapter 321, an appeal to the tax court under ORS chapter 321 or from an order of a county board of property tax appeals shall be filed within 30 days after the date of the notice of the determination made by the department or date of mailing of the order, date of publication of notice of the order, date the order is personally delivered to the taxpayer or date of mailing of the notice of the order to the taxpayer, whichever is applicable.

(5) If the tax court denies an appeal made pursuant to this section on the grounds that it does not meet the requirements of this section or ORS 305.275 or 305.560, the tax court shall issue a written decision rejecting the petition and shall set forth in the decision the reasons the tax court considered the appeal to be defective.