Solution : https://service.sap.com/sap/support/notes/1047938 (SAP Service marketplace login required)
Key words :
field ttxd-xtxit = 'x', automatically calculated tax amount, basic tab screen, error message m8 186, company code including, 'determine tax line-, tax amount, logistic invoice, transaction miro, entered manually
Related Notes :
| 976780 | Error during line-by-line tax calc without tax jur cde |
| 927857 | MIRO: FF 747 for manual tax entry |
| 902325 | Dump 'Dynpro_Field_Conversion' SAPLTAX1 screen 300 or 301 |
| 851545 | Distributing manually entered tax amount to tax line items |
| 798372 | Manually entering tax for jurisdiction codes line by line |