putting data into a PDF document

Giganews Newsgroups
Subject: putting data into a PDF document
Posted by:  internet.shoppi…@foobox.com
Date: Thu, 23 Jul 2020

I have a fillable pdf document that I did not create.

I been asked if I can place data into it from my database.

Looks as if it should be simple.  However I do need to know or be able to name the fields (cells) that will contain the data.

Does anyone know how I can find out the fields names?  Or at least give them names?

Once I have these I would need to open the pdf - any advice here would be welcome as to which application  and then assign values to the named fields.

Pointers in the direction of how to do this would be welcomed.