So I'm Claiming my 23 yo adult son as a dependent. On The Dependent options do i select other ? sense theres no option for Son ?

There should be an option for Son when you add a dependent.  Please see screenshot below.

To edit your Personal Info:

1. Open your tax return.
2. Click on “Take me to my return” button.
3. Click on “My Info” (left-hand column).
4. Edit your dependents name.