In order to take this course, your bankruptcy needs to be filed and you need the case number.   The format for the case number is YY-CCCCC.
The YY is the year the case was filed.  (Currently 16)   The CCCCC are the 5 numbers found after the letters bk in the full case number you were originally given. 
A full (sample) case number would be:
9:16-bk-99999-AB.  For this course, if this were your case number you would input 16-99999.