Use the TaxExemptionReason sub-element of the TaxCategory to specify this description.

Details

Detail	Value
Italian Specification	`2.2.2.8 (RiferimentoNormativo)`

Element

Element	Description
`Invoice/TaxTotal/TaxSubtotal/TaxCategory/TaxExemptionReason`	Specify the description.

Example

<ubl:Invoice>
    <!-- Code omitted for clarity -->
    <cac:TaxTotal>
        <!-- Code omitted for clarity -->
        <cac:TaxSubtotal>
            <cac:TaxCategory>
                <!-- Code omitted for clarity -->
                <cbc:TaxExemptionReason>free text description</cbc:TaxExemptionReason>
                <!-- Code omitted for clarity -->
            </cac:TaxCategory>
            <!-- Code omitted for clarity -->
        </cac:TaxSubtotal>
        <!-- Code omitted for clarity -->
    </cac:TaxTotal>
    <!-- Code omitted for clarity -->
</ubl:Invoice>