Dell printer, All-In-One 966

I own a Dell printer, All-In-One 966. For the past month, it has been printing two documents one on top of another. One document is always the same, Excel document, which acts like a template. I don't know if I turned on a special feature or what. I need to stop the Excel document from printing.

I need your help.

Sincerely, 

Richard J. Bigras