Income tax is charged for a year only if an Act so provides.

A year for which income tax is charged is called a “tax year”.

A tax year begins on 6 April and ends on the following 5 April.

“The tax year 2007-08” means the tax year beginning on 6 April 2007 (and any corresponding expression in which two years are similarly mentioned is to be read in the same way).

Every assessment to income tax must be made for a tax year.

Subsection (5) is subject to Chapter 15 of Part 15 (by virtue of which an assessment may relate to a return period).