Italian Bollo stamp duty is required on invoices where the subtotal of the lines without VAT exceeds 77,74 EUR.

If the requirement is met, Bollo charge is applied only once per invoice document, the charge is fixed, set to 2 EUR.

Standard solution is to manually validate all Sales orders to verify if the requirement for bollo stamp duty is met and apply the auto charge into the sales order before invoicing.

Ideally there should be a setup for Bollo in auto charges, where the sum of total invoice lines for certain items with VAT exempt were calculated and added automatically when using the “tired charges” in a Sales order, if conditions were met.

Potentially this could be done by adding the Items to a specific Item charge group and enabling the option also from the Auto charge header view, instead of only the line view. Additionally, there must be a calculation for subtotal of all invoice lines which contains items from this item charge group, so bollo charge is only applied once per invoice. The threshold amount EUR 77.74 must still be validated against the subtotals of invoice lines from the item charge group, to meet the requirements.