This discussion clarifies whether e-invoices can be modified. It explains that e-invoices cannot be partially cancelled; they must be fully cancelled within 24 hours via the IRN portal. If the cancellation window is missed, manual cancellation on the GST portal is required before filing returns.
An e-Invoice cannot be partially cancelled, it has to be cancelled fully. Once cancelled, it will need to be reported into the IRN within 24 hours. A cancellation done after 24 hours cannot be done on the IRN and needs to be manually cancelled on the GST portal before the returns are filed.