How do I set up dual currency in my books?

I'm here to help you with your currency, fathersheart.

This feature allows you to record transactions in foregin currencies. To do this, you'll have to turn this on.

Here's how: 

1. Click the Gear icon, then select Accounts and Settings.
2. Select Advanced.
3. Select Edit ✎ in the Currency section and choose your Home Currency.
4. Select the Multicurrency checkbox and confirm that you understand that you can't undo this option.
5. Click Save and close.

I've attached some useful help articles in case you have questions about QuickBooks Online. 

Feel free to drop a reply below if you have further questions. I'll be here to help you anytime.