The Purchase Taxes and Charges items are always in the document currency. But when the charge type is “On Item Quantity” it may need to be in the company currency. I would recommend adding a “Currency” field to the purchase taxes and charges items to allow the following options:
- blank
- Currency (i.e USD, EUR, etc)
If you leave it blank then it simply uses the rate in the document currency. If you use a currency then the rate is converted from the stated currency to the document currency using the exchange rate,