Noun. 1. orthoclase-a white or colored monoclinic feldspar. feldspar, felspar-any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium.rÂ·thoÂ·clase. A type of feldspar consisting of potassium aluminum silicate. Orthoclase is typically white, pink, yellow, or brown, but it can also be colorless. It is especially common in igneous rocks.
Year of Assessment. 'Year of Assessment' (YA) refers to the year in which income tax is calculated and charged. The assessment is for the income earned in the preceding year, starting on 1 Jan and ending on 31 Dec. Example: For YA 2017, the assessment is for income earned from Jan to Dec 2016. Back to top.
annual rate is defined in section EE 61 (Meaning of annual rate) annual rates means the rates of income tax fixed for a tax year by the annual taxing Act for that year. annual taxing Act means the provisions of any Act by which the rates of income tax are fixed for a tax year. annual total deduction is defined in section BC 3 (Annual total deduction) apply, for a mode of communication, has the meaning set out in section 14C of the Tax Administration Act 1994.