SWIFT ISO 15022 - Code TXFR Meaning Tax Free: Rate relating to the underlying security which is not taxable. Usages Message type Field number Tag MT564 (Corporate Action Notification) 64 92a (Rate) MT564 (Corporate Action Notification) 95 92a (Rate) MT566 (Corporate Action Confirmation) 45 92a (Rate) MT566 (Corporate Action Confirmation) 85 92a (Rate)