Solution : https://service.sap.com/sap/support/notes/838543 (SAP Service marketplace login required)
Key words :
skip tax calculation, accit-xmwst reason, structure accit, field xmwst, include lfacif4o, terms lfacif4o, suggested corrections, prerequisites
Related Notes :
841483 | Acquisition Tax Accruals: Availability for Release 4.5B |