Definition of “estimated tax.” As used in ORS 316.557 to 316.589, “estimated tax” means the amount of income tax imposed under this chapter for the taxable year, as estimated by the individual, minus the sum of any credits as estimated by the individual against tax provided by this chapter. [1980 c.7 §4; 1985 c.603 §4; 1997 c.839 §21; 1999 c.90 §16; 2001 c.660 §44]

ORS 316.557 — under Chapter 316.