It is easy. Login to your Account, select My Profile, select Linked Accounts, select Upload for the account that requires the documents and follow the steps to upload the documents. You received an email with the same instructions. Customer Support automatically receives a notice of your upload and the documents are in order will validate the account for use. If not then you will receive an email with instructions.
You can add your personal identification from the same screens as below or you can add it once to your My Profile page near the bottom of the page.
You can add your personal identification from the same screens as below or you can add it once to your My Profile page near the bottom of the page.