I know this has been posted elsewhere but I cannot find it and figure we could all use the information again. I think Marilyn gave the instructions on another thread. Help! 

Hi, Julie! It was EveDallas, and it's in the Free Library of Philadelphia thread. She says:

 Here is how to return an eBook with the Adobe Digital Editions software.

Open Adobe. Bring up the list of borrowed books. It has to be in LIST form, not an open eBook. To get the list, there is a Button to the far left of the top of the page. It is an icon of 3 books. Click on that. Your books will be in a list. Highlight the one book you want to return. To the left, there is an arrow before the title. Left click it, and a drop down list should appear. The bottom one says, "Return borrowed Item." Click that. A box appears asking, "Are you sure you want to return the item?" Click "Return." The log of the eBook has been returned to the library system, but the eBook file is still on you hard drive and needs to be manually deleted.

My Lib show I still have the books even when returned early