Hulloo,

I suggest reading this guide:
http://forum.topeleven.com/tutorials...beginners.html

There is no such thing as a single formation that always wins, but a few basics are:
- PLay a formation that best fits your strongest players
- Set up your defense in such a way that the opponent's attackers can't get through easily (DMC against AMC for example)
- Try and set up your attack in such a way that they avoid opponent's defense (Opponent uses DMC? Better use flank-attacks with AML/AMR)

That's what usually works for me. Goodluck!