A unit of measurement required for certain commodity numbers when submitting Intrastat declarations.

Supplementary Units are defined in the Combined Nomenclature (CN) and are used to measure goods in a way other than net mass.
Detailed explanation/description:
In SAP Business One, the "additional unit" refers to an alternative unit of measurement that must be used for certain commodity codes as part of Intrastat declarations. This unit of measurement supplements the standard indication of net mass (e.g. in kilograms) and is used for more accurate statistical recording in accordance with the specifications of the EU Combined Nomenclature (CN). SAP Business One supports this process via the Intrastat Add-on that enables the creation of country-specific Intrastat declaration files.
Companies within the EU must submit these declarations to national statistical authorities to record their intra-Community trade in goods. The Intrastat add on includes functions such as the Intrastat Administrator, which can be used to update statistical data in existing documents (e.g. goods receipts, invoices, deliveries), as well as the Intrastat Configuration Tool for setting up the add-on.
The additional unit is defined centrally here and automatically included in the report in connection with certain goods items.
Integration into business processes:
The additional unit is used to create and update Intrastat declarations and is automatically transferred and processed from logistical and accounting documents such as goods receipts or invoices.
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