First, you will need to log in and go to https://ice3x.com/account/transactions
Click on the button marked "Export to Excel".
An email with the link will be sent to your registered address. Go to your emails and click on the link.
A zipped file will be downloaded once you click on this link.
When you extract the zip file, you will have the excel document ready to go. On the Mac, double-click on the zip file to automatically extract it. On Windows, you will need to right click the file and select "Extract All".