Notwithstanding this, it is basically discontinued and can no longer be
purchased except as part of a suite costing tens of thousands of dollars
(as I understand it).You are NOT MEANT to edit these forms, and trying
to can cause SERIOUS issues. This often happens with Government forms.
Worse, people sometimes do manage to edit it, which makes the forms
useless and may get into all sorts of issues with the Government. DO NOT
TRY TO EDIT IRS FORMS, EVER !! Only fill them.