Jack: okular (and poppler apps in general) won't open some (all?) files with filled in forms.
I had many such files in the past where I had to use acrobat...

Am Mi., 22. Sept. 2021 um 22:19 Uhr schrieb Jack <ostroffjh@users.sourceforge.net>:
On 2021.09.22 15:06, thelma@sys-concept.com wrote:
> I have a pdf fillable form which I can only open in acrobat reader on 
> Windows.
>
> Which package do I use to read these form on Gentoo?
You should be able to read them with any PDF reader.  Not all readers 
will allow you to fill in the forms and save with the inserted data.  I 
use Okular for that, but the dependencies may be a lot if you don't 
already run KDE.  I wouldn't be surprised if the Gnome PDF reader 
(evince?) can also do it.

Jack