The best way to ask the question "do you need help?" is the following:
Est-ce que vous avez besoin d'aide?
In this exercise, you have the sentence that is translated to "do you need help?" in English.
The tense that is used in the sentence is called le présent in French, and it is the present tense of the indicative mood. It is used to talk about actions that are current and also states of being.