Salesmen sign in on the normal site and get the POS button. They can sell at the till but cannot open the admin panel.Open the POS
Taxes — listed prices already include them
Press + Add tax, give it a name, choose Per piece per ml (dollars for every ml: pieces × ml × amount) or Percentage on total price, and type the number. Then choose it in the Tax list when adding or editing a product — or use Apply to to put it on a whole category at once. You can change a number whenever you like and press Save: new orders use it straight away; orders already placed keep the tax they were saved with.