Solution : https://service.sap.com/sap/support/notes/864824 (SAP Service marketplace login required)
Key words :
item details screen, prerequisites plant abroad, tax code field, code change, contract document, change mode, material number, quantity contract, dump dynpro_msg_in_help, terms dynpro_msg_in_help
Related Notes :
1175497 | F4 help MWSKZ in FB01 ME21N ME31K for CoCd w/o Plants Abroad |