I honestly have not done any tax stuff with the new upgrade, however, I have encountered some issues in the past with not being able to send password protected PFD files. You might check to see whether your password protection is set to the on position.
Are you getting any sort of error message when you try to send PFD's with EMclient?
I upgraded to a new laptop a while back, and bought the Microsoft Office package, so I am using MS Outlook, and have not used EM client for quite a while now.
