I'm not really sure what you're asking BUT here's some info that might help you:
Once you've logged into interfolio, select the link "start delivery" and it will ask you to input the institution's name. Type in the name of the destination institution and press enter (pretty much all of the schools are already on file). Once you have selected the schools, select "add document" and follow the pop-up instructions and when you have completed uploading your documents to all the schools of your choosing, you can select the deliver the documents and process your payment.
I hope this helped. Let me know if you need more clarification.