Solution : https://service.sap.com/sap/support/notes/704377 (SAP Service marketplace login required)
Key words :
service charge settlement concerns letters sap_re-rt-sc001, news letter bmf-info iv, sales settlement concerns letter sls_sttlmnt_01, nkab - sap_re-rt-sc001, sap standard sample letters, sost - sap_re-rt-ra001, 'paste -> symbols -> program symbols', choose field 't001-stceg', service charge settlements, slst - sls_sttlmnt_01 reason
Related Notes :
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| 493948 | Tax number for article 14 |
| 489374 | Invoice printout: totals rows per tax rate |