Solution : https://service.sap.com/sap/support/notes/702568 (SAP Service marketplace login required)
Key words :
system generates error message ff804, terms manual tax posting, alternative tax account reason, manual tax posting, alternative tax account, automatic account determination, tax account, transaction miro, transaction ftxp, solution implement
Related Notes :
574934 | FB60/MIRO: Direct posting to tax account. |
509923 | FBCJ: Direct tax posting and automatic account determination |