What you should do is create a dummy bank account, called something such as ‘FX Account’. My colleague @Glenn mentions more about this here (although in a different currency):
http://community.quickfile.co.uk/t/paying-an-invoice-in-gbp-from-a-pln-denominated-bank-account/9342/2?u=qfsupport
As for the currency charge, you could do one of two things:
- Add a new line to the invoice to reflect the difference, or
- Create a new money out transaction in your bank account and tag it directly to 7902 using the “something else not on the list” option.
Hope that helps!