You can display the country under the "Bill To" address on your invoices.
To display the country on your invoices:
- From the toolbar atop the screen, click your Profile Icon.
- From the drop-down, click Setup.
- From the Setup left navigation, click Firm Settings.
- From the tabs atop the Firm Settings screen, click Invoice Settings.

- Under Invoice Print Settings, click the box next to Print Country to check it.
- Click Save.
The country will display when you generate an invoice.
Here's an example: