What materials do I need to fill in to give up my patent application?

You don't need to submit anything. After the reply period, it will be regarded as withdrawal. If the time limit for reply is exceeded, a notice of withdrawal will be sent to you, and you can also go through the formalities of restoring your rights. If you haven't done anything after the right recovery period, your patent is completely dead. Of course, you can also take the initiative to submit a "withdrawal statement", but you'd better wait and see the withdrawal in case you regret it in a few days. .