Commodity codes and customs tariff numbers are master data in SAP GTS. They are assigned to a combination of numbering schemes and numbering scheme content.
If you want to use SAP GTS in for both import and export processing, you have to define at least one numbering scheme and one numbering scheme content each:
Export declaration or transit declaration: Numbering scheme/numbering scheme content for mapping a nomenclature of commodity codes usually for foreign trade statistics
Import Declaration: Numbering scheme/numbering scheme content for mapping the national customs tariff of the importing country
To create or edit a numbering scheme for commodity codes in Customizing, choose SAP Global Trade Services, edition for SAP HANA → General Settings → Numbering Schemes → Commodity Codes → Define Numbering Scheme for Commodity Codes. To define numbering schemes for customs tariffs, choose SAP Global Trade Services, edition for SAP HANA → General Settings → Numbering Schemes → Tariff Numbers → Define Numbering Scheme of Tariff Numbers instead.
You define the corresponding numbering scheme contents using the menu path SAP Global Trade Services, edition for SAP HANA → General Settings → Numbering Schemes → Commodity Codes → Define Numbering Scheme Content for Commodity Codes and SAP Global Trade Services, edition for SAP HANA → General Settings → Numbering Schemes → Tariff Numbers → Define Numbering Scheme Content for Tariff Numbers.
The structure of the numbering scheme contents delivered corresponds to the actual structure of the nomenclature of goods or the respective customs tariff. If you decide to upload the commodity codes, you should check the formatting in one of the XML files of your data provider.
If your data provider structures the data differently, you should copy the delivered numbering scheme to the customer name space and adjust the copy accordingly. The same applies if you create a new numbering scheme for a customs tariff that is not contained in delivery Customizing.

The numbering scheme EUSTA (Commodity Codes - EU) contained in delivery Customizing represents the CN. This numbering scheme is assigned to the legal regulations for customs processing and for the transit procedure in different Member States (menu path: SAP Global Trade Services, edition for SAP HANA → General Settings → Numbering Schemes → Assign Numbering Schemes to Legal Regulations). The assignment of numbering schemes to legal regulations in Customs Management is required for classifying products in nomenclatures of commodity codes and customs tariffs.
Note
If required, you must add missing codes for units of measurement. A compilation of all EDIFACT measurement unit codes is available on the UNECE Web site in "Recommendation No. 20" (https://tfig.unece.org/contents/recommendation-20.htm or https://digitallibrary.un.org/record/635432).