The EC sales report shows the net (tax exclusive) value of all sales for a chosen tax code between two dates, grouped by customer tax number.
It's intended for UK merchants submitting an EC sales list (which is no longer a requirement), but can be used by anyone wanting similar data.
The customer's country and tax number are displayed in the table.
If customers with sales matching the tax code have no tax number, then the value will be grouped into a row marked "N - no tax number", with a link to view all transactions.
View the EC Sales Report at Reports > Accounts > More... > EC Sales.