Income tax is money people and companies give to the government from what they earn, to pay for things like schools, roads, and services.
Taxable income is the piece of the money someone earned that is used to figure their tax. The tax rate multiplies this amount to determine how much tax to pay.
In some places, as people earn more money, they pay more tax. This is called a progressive system.
A taxpayer is anyone or any group that must pay tax—like a person, a family, or a company.
A resident is someone who lives in a place and is taxed there on most of the money they earn, even if it comes from other countries. A non-resident is someone who does not live there and is usually taxed only on the money earned from that place.
Income means the different ways people get money, like pay from a job, tips, profits from selling things, interest, dividends, rent, and pensions. Some employer benefits, like health care plans, are often not counted as taxable income.
Deductions are amounts you subtract from earnings before taxes are figured, like the cost of supplies, rent, or wages for helpers. An exemption lowers how much income is counted for tax, and some places give a standard exemption while others let you show receipts for real costs. Tax officials sometimes check records to make sure deductions and exemptions are correct.