need help please i could not fix this problem for while need help The timestamp in QR Code should be based on Invoice Issue Time (KSA-25) and Invoice Issue Date (BT-2). It can either be in format YYYY-MM-DD’T’HH:MM:SS (for local time in KSA) or YYYY-MM-DD’T’HH:MM:SS’Z’ (for UTC time or Zulu time)