Tax expenditure refers to deviations from the normal tax structure that provide preferential treatment to certain activities or groups. These deviations result in a reduction of government revenue that would otherwise be collected. 1. Exemptions under corporation tax reduce the amount of corporate income subject to tax, thus lowering the tax collected. This is a form of tax expenditure. 2. Accelerated depreciation allows businesses to deduct the cost of assets faster than their actual wear and tear, reducing taxable income in the earlier years and deferring tax liability. This is considered a tax expenditure as it provides a benefit compared to normal depreciation rules. 3. Deductions or exemptions on export profits earned by Special Economic Zones (SEZ) units are specific tax incentives aimed at promoting exports and economic activity in SEZs. These provisions reduce the tax burden on these entities, representing foregone revenue.