When a party fails to respond to interrogatories, file a motion to compel and request sanctions.  The motion to compel is to compel responses to the interrogatories.  Sanctions are fines you can request from the court for the expenses you incur in preparing and filing the motion to compel.  At the law library, look for motions in the index of Pleading and Practice.  You will see the general format for a motion and there may be an example of a motion to compel further responses.  Since you are filing a motion, you will also need to file a memorandum of points and authorities.  At the law library, look for a book called Points and Authorities.  In that book, look for points and authorities supporting a motion to compel. In your question, it is unclear to me why you are still dealing with interrogatories when you already have a judgment in the case.  Interrogatories are normally in the Discovery phase of litigation, while a judgment is the end of the case.