I was told that I could file for a child support increase online. I was just wondering if anyone new if that was true and if it is, does anyone know where I would go to do that (as in what web site)?

Bargain basement legal advice will only get you bargain basement results. Go big or stay home.

Not unless your court has a online filing system, you can contact your local court and ask, but I truly doubt it, for an increase, you have to file a motion in court, they will request the other party to provide proof of income, and other info as required by your state, most likely you will have to furnish some info also, there will be a court hearing on it, and the judge will rule.