How do I add/change commissions on selling rates of my partners?

Login to your account using your Username and password.
You will then find a tag with a person. Click on the person and you will enter into the Virtual Office.
You will find various options under the menu on the left side. Click on the Commission in the More tab.
And it’s the same place where you manage your commissions amount, if you are reselling someone’s rates – you can COMMISSION section, and manually set the scope of commission to show on top of your partner’s selling rate.