I save the original as downloaded then my edited 4457s with the file name: mylastname_4457_year . That way the original isn't changed and can be edited and used again. The edited version is sent to the rifle permitting agent.Thanks @Hogpatrol
I finally got it to work - and typed in my data and printed for two rifles.
The issue was my version of Adobe Acrobat. I downloaded and installed the current (free) version on my PC and all went smooth...
As a side note - if you have downloaded the 4457 pdf file, tinkered with it - and then saved - you may need to start over with a fresh download.