German phrase
Welches Feld ist für ~?
Meaning
Which field should I use for ___?
When to use it
Ask which field to use. It is a slightly polite question for forms and surveys.
Example dialogue
Welches Feld ist für die Telefonnummer?
Which field should I use for the phone number?
Das ist das dritte Feld von oben.
It is the third field from the top.