Hi itravel,
Thanks for reaching out here. It's great to hear that you've chosen the multicurrency feature in QuickBooks. There currently isn't a way to 'hide' the currency on your invoice. However, if you'd like to see the option available in future updates, please feel free to submit a suggestion to our Development Team. Customer recommendations are greatly appreciated to help improve your overall customer experience with QuickBooks.
If you have any other questions, please don't hesitate to reach back out. We'd be happy to help!