Solution : https://service.sap.com/sap/support/notes/1243787 (SAP Service marketplace login required)
Key words :
incorrect exchange rate difference, exchange rate difference, document exchange rate, system issues f5 061, tax detail screen, local currency amount, incorrect transfer, tax screen, local currency &, local currency
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1273626 | Exchange rate difference w/ FB01 if tax chnged in local curr |
1141955 | FB01 should also create exchg rte diff lines w/o tax rate |