How Do I Remove The Watermark In Order To Print Back Tax Forms Using Adobe

I am using an old Turbo Tax Home & Business application, but since it is for the 2014 Tax Year I can't update the software installation, because Turbo Tax no longer supports software older than 3 year old. 

 

I can install the software, but all my forms have a Watermark on them "Do Not File. etc."   The forms are ready to print, but I can't find a way to remove this watermark.  Can someone explain how to do this using Adobe or another .pdf viewer/editor?