Now your icon should appear in the taskbar. Re-check the box and then click Apply again. If it’s already checked and the icon is not showing up, you need to uncheck the box, and then click Apply.
You’ll notice the “ Place volume icon in the taskbar” option is either checked or unchecked.
Once you open the dialog, you should already be on the Volume tab. Personally, I like Classic View better since it’s easier to get to what you want quickly.