dochodowego

In a sentence

• Podatek dochodowy jest obowiązkowy w Polsce.

  Income tax is mandatory in Poland.

  Here, "dochodowy" is used as an adjective describing "podatek", indicating a type of tax related to income.

• Zasada podatku dochodowego różni się w zależności od kraju.

  The principle of income tax varies depending on the country.

  Here, "dochodowego" is the genitive form of "dochodowy", showing a grammatical relationship indicating possession or origin.

• Wysokość podatku dochodowego zależy od zarobków.

  The amount of income tax depends on earnings.

  Here, "dochodowego" is used in the same grammatical case (genitive) as in the previous sentence, attached to the noun "podatku" to show specification.