I am make an invoice and want to charge in US dollars but I only seem to have the option to charge euro. How can I change this to dollars ?

You can use our Multicurrency feature, userjimi.

The Multicurrency feature gives you an option to record your transaction in foreign currencies. Just a heads up, once the feature is turned on you cannot turn it off again, just ensure that you want to turn it on.

Here's how to turn on this feature: 

1. Go to the Gear icon and select Account and settings. 
2. From the Advanced menu select the Currency section. 
3. Select your Home currency and confirm that you understand that you can't undo this option.
4. Click Save and close.

To know more about this feature you can click here. Now you have the option to assign foreign currencies to your sales transactions and even on your customer's profile page. 

Feel free to post your questions here. I'd be glad to help. Take care!

@userjimi 

If you don't prefer to enable the multi currency feature, consider opening a virtual business account at TW and utilize the bank feeds. You may send the invoice in your local currency (e.g Euro) and you client will pay it in their local currency (e.g USD).

https://prf.hn/l/7gg1NWy