How can I correct when I print the returns there are blacken lines running throughout the document but when you view the pdf on the computer it is clear.?

[retiree · Accepted solution]

That sounds like a problem that showed up last year which was caused by a certain version of Adobe Reader introducing the black lines.  As I recall, it started after Adobe started to push users to use their 'cloud' based Reader --which had some inherent problems.  I use Adobe Reader v 11 (XI) which is installed on my PC and not cloud based, and works fine. 

There are several sites that offer downloads of v 11, as well as some sites that offer other products that 'replace' Adobe Reader (such as Foxit).  You can Google for 'pdf reader'.  If you do download a version of Adobe Reader MAKE CERTAIN that the description and/or version  DOES NOT contain "DC" (which indicates it is a cloud version).  

YMMV