sir, in a private limited company if someone has issued invoice wrongly- in which taxable value + gst - discount = total value and another one- taxable value+ gst(on taxable value)+packing charge+freight=total value these invoices were issued from the month of October 2020 to onwards himself without guidence of any accountant or CA. but not filed gst returns till now. and the gst registration was cancelled on 15 June 2021. now can these wrong invoices be reissued/rectified ? how. how to feed it's data/figures in gstr1. please guide me what and how to do.