Is Erlös der, die or das?

The correct German article for Erlös is der. The noun Erlös is Masculine. So you always say: der Erlös. Learn the article together with the noun — German nouns don't follow predictable gender rules most of the time.

The plural of Erlös is: die Erlöse. In the plural, every German noun takes the article "die". So: die Erlöse. Example: ein Erlös → zwei Erlöse.

Correct: die Erlöse. The form "die Erlöss" is wrong. The plural of der Erlös is die Erlöse. In the nominative plural, you always use the article "die".

der Erlös follows the four German cases. Nominative: der Erlös, Accusative: den Erlös, Dative: dem Erlös, Genitive: des Erlöses. In plural: die Erlöse / den Erlösen. Learn these forms together with the noun.

The genitive singular of der Erlös is: des Erlöses. The genitive plural is der Erlöse. German uses the genitive to express possession or belonging. Example: die Farbe des Erlöses.

The dative plural of Erlös is: den Erlösen. In German, dative plural nouns usually end in "-n". So you say: "mit den Erlösen". Use this case after prepositions like mit, von, bei, zu.

Erlös is a noun and must be capitalized in German. You'll find example sentences above for each case. The article der stays the same in nominative singular but changes in other cases. Practice declension in your own sentences.

Yes, Erlös is a noun (also called a substantive). German nouns are always capitalized. The article for Erlös is der. Every German noun has a fixed article you must memorize.