i cant duel because i dont know what new banlist today.... invalid deck but not know what wrong

In deck edit it should show you what is banned in your deck with a red symbol over the card. Keep in mind the OCG and TCG banlists have differences so if you go into a duel with a TCG legal deck but the duel is using the OCG banlist you may not be able to use that deck.

Here are the two lists:
http://yugioh.wikia.com/wiki/July_2015_Lists_ (TCG)
http://yugioh.wikia.com/wiki/July_2015_Lists_ (OCG)

---