German phrase
Welche ~ benötige ich?
Meaning
Which ___ do I need?
When to use it
Asks what is required. It is common in forms and official procedures.
Example dialogue
Welche Unterlagen benötige ich?
Which documents do I need?
Bitte bringen Sie Ihren Ausweis und das ausgefüllte Formular mit.
Please bring your ID and the completed form.