Solution : https://service.sap.com/sap/support/notes/488066 (SAP Service marketplace login required)
Key words :
parameter imp exp lpos sporktokk 1 1sortl 2 2mcod1 3 3lifnr, include field 'local tax office', enter short description 'append search, select dialog type 'dialog, customer-specific append search, enter selection method lfa1, customer-specific elementary search, included search helps tab, select 'goto --> append search, field 'tax number'
Related Notes :
| 488137 | §48 EStG: Composite note on questions/probs in environment |