Opening data entry only form from data entry only form for same re

G'day,

I have a form based on my table "tblclient". This form is data entry only
and I would like to include a command button that when pressed opens a
separate data entry only form based on my table "prospect tracker".

The tables are linked via the primary key of both tables: "client id".
"client id" is automatically created upon entry of data into the main form.

How do I link the forms together wanting the secondry form to be associated
with the primary form?

Cheers,