I need to create a custom (freetype) field for purchase requests, but I dont want that field to show on the PO. Is this possible? Seems like they are the same form so it seems impossible to me.

You could conditionally set the field's display type to Hidden in a workflow or script, based on the user's role/role center

How would you show it for POs but hide it for Purchase Requests? @Anthony (NimbusLabs)

The purchase requests are being entered on the employee center, correct? When users are in an employee center role, they are in a different "Center" (i.e Employee Center). So, you can use a script to conditionally hide the field based on the user's Role Center. OR, you can use a workflow to conditionally hide the field based on the user's role. I.e if Role is "*Company Name* Employee Center", then hide the field

Gotcha, that makes sense. Let me try this out, thanks a lot @Anthony (NimbusLabs)

Np, let me know if any issues and i can help you out.