Application for withdrawal of assessment order requires GSTIN, order details, grounds, and authorized verification signature. GST ASMT - 17 is the prescribed application form for withdrawal of an assessment order under section 64. It requires GSTIN/ID, applicant name, the order's reference number and date, the relevant tax period if any, and the grounds for withdrawal. The form requires verification by an authorized signatory who must affirm the truthfulness of the information, provide name and designation, sign, and date the application.