Hi Aman,
Your remarks are very helpful. I have gone through the SPRO and A001 is marked as manual entry, however the info says it only applies to duty types B*
Indicator: Handle Manual Entries for Customs Tolls
Handling of manual entries for customs duties
Use
Control of readiness for input for customs duties with type B*, such as customs duty B100 (third-country duty) or B200 (preferential customs duties)."
Apart from that the whole screen in Customs value tab is empty and there is no button to add the duty types manually. This screen looks non active (see attachment in my original post) with Calculation status - Calculation not completed - no result possible.
Best regards,
Olaf