Add a country

Go to the Settings menu, under 'Locations & Taxes' click on Countries. 

Click the 'New country' button on top of page. 'Create country' page appears. .

'Create Country' page

Name - enter the name of the country here
2-letter country code - Enter the 2-letter country code by ISO 3166-1-alpha-2 standards

3-letter country code - Enter the 3-letter country code by ISO 3166-1-alpha-3 standards

Address format - This field is for the address format. If you don't know it, check this link: http://bitboost.com/ref/international-address-formats.html

Create - click "Create" when you are ready