Remove form field padding using JavaScript

Basically what I'm trying to do recreate text in Photoshop as form fields in Acrobat. Unfortunately, both programs handle placement inside text box bounds differently. I'm trying to align my Acrobat text to the top of its form field or at least understand how Acrobat calculates its top margin. In the example below, the bounding boxes are the same, but the top margin results in clipping in Acrobat.

Photoshop:

Acrobat:

Even when I use the rich text tools in Acrobat and set the top to 0, there is still a margin.

Hopefully that makes sense!