Deferred tax arises from temporary differences between accounting profit and taxable profit. Temporary differences occur when income or expenses are recognized in different periods for accounting and tax purposes. Deferred tax assets arise when accounting profit is less than taxable profit, and deferred tax liabilities arise when accounting profit is greater than taxable profit. The document provides an example to illustrate deferred tax calculations over 6 years for an office equipment asset with different depreciation methods between accounting (straight line) and tax (reducing balance). It shows the annual temporary differences, deferred tax impact, and accounting entries for deferred tax and income tax.