Hello Pratibha,
you want to Transfer additional data for your orders, not for you custom declaration. Okay. First pick Transaction SPRO and go to:
Foreign Trade/Customs ---> SAP Global Trade Services - Plug- --->In Business Add-Ins for SAP Global Trade Services --->Change and Supplement Document Data for Transfer ---> BAdI for Mapping and Enrichment of Data from Sales Documents (SD0A).
Here you must implement your BAdI e.g.
and activate it
Then you can go to the Interface an pick up the coding for the Methode IF_EXTEND_CON_CDOC
Here you can use the following structures
In the structrue sllr3_api6800_con_hdr_s and sllr3_api6800_con_itm_s you'll find the same fields that I have described for the customs declaration .
You can now carry out the same for your deliveries by using the next customizing Point ---> BAdI for Mapping and Enrichment of Data from Outbound Deliveries (SD0B)
Hope that helps
Regards,
Thomas