The document provides an introduction to income tax concepts including:
1) It defines income tax as a tax imposed by governments on the income generated by individuals and businesses within their jurisdiction, with taxpayers required to file annual returns.
2) It distinguishes between direct taxes, where the tax burden falls directly on the taxpayer, and indirect taxes, where the burden is passed on to consumers. Income tax is an example of a direct tax.
3) It outlines key income tax terms - the assessment year is the year income is taxed, the previous year is when the income was earned, and an assessee is anyone subject to income tax rules.