A tax is a percentage of money paid to the government by businesses, consumers, and individuals. The money that is collected pays for services that we all need: police protection, emergency services, road construction, schools, public heath, etcetera.
Many people don’t like to pay taxes.
The Internal Revenue Service (IRS) collects taxes for the federal government.
My neighbor says he’s going to stop paying his taxes, but then he’ll risk going to prison for tax evasion.
There’s a six-and-a-half percent tax on goods sold in this state.
Taxes vary from one state to another.
Property taxes collected in the state where I live help pay for public schools.
Taxes are due on April 15 every year.
A refund is sent out if you pay too much in taxes.
An accountant can help you with your taxes if you aren’t sure what to do.
In these sentences, the word "tax" is a verb:
The government taxes your purchases.
You are taxed on your purchases by the government. (This sentence is in the passive voice.)