Hi Audrey! I'm not sure whether you mean the tab key on your keyboard, or is there a HubPages "tab feature" I'm not aware of? Anyway, I've tried using the tab key to indent my text, but the HubPages editor ignores it and aligns everything left. I've pretty much given up on indenting!
By the way, this question looks like it might make a good forum post. You'd get lots of folks chiming in, and maybe one of them has a better answer for you. :-)