Visit this link http://tankionline.com/battle-en.html, click "New Player" at log-on panel, choose a username and password to create a new account.
i need to swich my account and i cant
Hey, please follow these steps. If you are on the HTML5 version (Browser/Client) of the game, please follow the solution here and do the same as mentioned in the article linked first.
Customer support service by UserEcho