To export a selected invoice or good issued notes to

xmlx file:

1. Log in to your account
2. Press the "Account" tab at the top of the page
3. Select the section "Invoices and goods issued".
4. Go to Invoices or Good issued notes section 
5. Go to the details of the Invoices or Good issued notes by clicking on the number
6. After going to the details press "Export to file" button