When you created your XML file and you are in PIER, follow the next steps to upload your XML:

1. Choose File upload option from the Menu.

2. Choose Files ensuring that you have a new generated XML and not XLS.

3. Click on Upload.

4. When you upload, you will receive a "green" confirmation message on top.

5. Afterwards Check the box of the file you are going to upload.

6. Click on Send.

7. You will receive a confirmation that your file was submitted.