Immigration Site

American Indian born in Canada.

Please help me understand two rather novel concepts that the Uscis website and phone line have failed at.

How and where do I obtain a I-89 form ( from what I gather its for green card processing and it might be from the office itself.)

Secondly, an FD-258 form is requested as well, but I think this is also given at the time of my next appointment. Ive looked for a few hours on the website and the various chat engines found on the web, but sadly, Ive come up with nothing.