Add or Edit Child's Data Object's Record

Hi there,

I have a User table object and a connected table object.

The connection is One child object is to One User. I only need one record on the child per user. There’s a lot of fields so I decided to separate it on a different object just to categorize it as well.

This results to being able to have many child record per user and
The having two different form/routes of adding and editing a record on the child.

It is possible to have a single form that can edit or add a record on the child data object?