A tax: a compulsory payment levied by national or local governments on individuals or businesses to fund public services (e.g., income tax, consumption tax, corporate tax).
毎年確定申告で税を納める必要がある。
You need to pay taxes via the annual tax return each year.
消費税率が引き上げられたため、商品の価格が上がった。
Because the consumption tax rate was raised, prices of goods went up.
税の仕組みを学校で学んだ。
I learned about the tax system at school.