I really do know that you mean by this, but you would not roll a skill on the combat tracker only combat attacks.
Skill are in the Skills tab, once you add them. They then display the result in the table window. Make sure you have all the modules activated and loaded, if you need a more verbal 1 on 1 hit me up in my discord and I can go through it with you.
Or check out the Greenbrook stream below and you can see from the play perspective how combat works.