It's not a PDF form - it's an XFA form created in LiveCycle Designer (which Acrobat can't edit, hence the restrictions you see).
Thank you very much for the answer. I do have one more question. I would appreciate if you can give me a hand again.
Is there a away to convert a Word or other Microsoft office files to PDF file with same restrictions like the IRS from 1040 without setting a password? So, no one including the document owner can't edit it.
In Acrobat you can encrypt a PDF with permissions password only. This allows anyone to open this PDF but only those who know the permissions password may change permissions. You will be one of those. This applies to all PDFs. To do what you want you need, first, to convert MS Office file to PDF and then apply encryption with permissions password to this PDF.Note that all Adobe products enforce PDF encryption permissions but some other PDF tools may not.
Great. Thank you very much!