Entering Exchange Rate Information on Invoices
If you use multicurrency accounting, you can also edit the invoice rate type, rate date, and exchange rate for vendors who do not use the functional currency or are members of the EMU.
If you selected a receipt for the invoice, the Rates tab displays the vendor's rate date, type, and amount from the receipt and default entries for the invoice rates. You can change the rate information for the invoice.
If you are entering a transaction with retainage, you specify on the Retainage tab whether the retainage invoice uses the same exchange rate as the original document or the current rate.