German phrase
Bis wann muss ~ fertig sein?
Meaning
By when does ___ have to be finished?
When to use it
It asks for a deadline. Use it to check when work must be done.
Example dialogue
Bis wann muss der Bericht fertig sein?
By when does the report have to be finished?
Der Bericht muss bis zum 10. Mai fertig sein.
The report has to be finished by May 10.