Fix Acceptance Letter File Name Printing to PDF or Smartvault

[Tambren]

Please change the default names for the acceptance letters to include what form is being accepted.  The file name prints the same (to Smartvault for example) no matter whether we are printing the letter for an extension. or tax return, or amended tax return.  This causes our letters to get overwritten unless we remember to change the file name manually on previously printed letters first. This needs to be fixed before next tax season!!