In cases where an e-invoice needs to be corrected or cancelled, please follow the steps below depending on the status in the tax portal:
Since the cancellation function is not available in the UBS system, the recommended action is to issue a credit note.
If the eInvoice is rejected by the tax portal, then there is no need to validate the credit note.
If the e-invoice has not been rejected or canceled within the tax portal, proceed to create and validate a credit note.
Cancel from MyInvois Portal the 2nd duplicated document in the portal or create a CN online to offset the duplicated amount.