323.365

(1) The Department of Revenue for good cause may extend the time for making any report or paying any amount of tax required under ORS 323.005 to 323.482 . The extension may be granted at any time provided a request is filed with the department within or prior to the period for which the extension may be granted. The department may not grant an extension of more than 30 days.
(2) Any person to whom an extension is granted shall pay, in addition to the amount of tax, interest at the rate established under ORS 305.220 for each month, or fraction of a month, from the date on which the amount of tax would have been due without the extension to the date of payment.