Italian legal entities which are usual exporters manage a tax plafond which is tipically reflected on a benefit in purchase transactions. The tax plafond is calculated on a yearly basis considering transactions posted in the previous year, the base amount might differs from legal entity to legal entity but it generally includes exportations, EU sales, San Marino sales, assimilated operations and special operations. Despite these five categories are available in the tax plafond form, Dynamics 365FO can't calculate the tax plafond amount itself. It would be appreciated if the process could be the following:

1) Create a new plafond for year +1

2) Set the checkboxes for transactions to be included in the tax plafond yearly amount (exportations, EU sales, San Marino sales, assimilated operations, special operations)

3) Calculate plafond balance considering transactions at bullet 2) considering transactions posted in year 0