Hey there GrapegirlJoan,
Welcome to the QuickBooks Community! Thanks for reaching out to us here. QuickBooks Desktop is a great software that can help make managing your business smoother. I would be happy to provide some information.
Multicurrency is a great feature to use! You can create new accounts and customers in Desktop for foreign currencies. Keep in mind that once multicurrency has been turned on, there isn't a way to disable it. Here is a helpful guide on how to set up and use Multicurrency. If you require further assistance, I recommend reaching out to the support team outside of the Community as they have the ability to verify your account details in a secure setting, as well as view your screen to better assist you. You can reach them by following the method in this link.
If you have any other questions, feel free to reach back out to us.