If you choose not to map your data, ensure that you define the country using IAF CertSearch's Countries dataset. You can view the full list here: Countries To perform the mapping, choose "Country" as the Field Name.
Go to 'Import Settings'
Click the 'Global Mapping' tab
In the Data Mapping tab, click the '+ Add Data Mapping' button
Select Country as the Field Name you want to do that mapping to.
Enter the value of the source data, for example: UK
Select the target Country Name where you want the source to be mapped.