German phrase
Bis wann muss ich ~ beantragen?
Meaning
By when do I have to apply for ___?
When to use it
It asks for a deadline. Use it to check when to submit an application.
Example dialogue
Bis wann muss ich ein Visum beantragen?
By when do I have to apply for a visa?
Am besten mindestens vier Wochen vorher.
It is best to apply at least four weeks beforehand.