What can i do about my childs tantrums? i dont know what to do anymore,timeouts doesnt work he has a tempur ?

When a child throws a tantrum, they are looking for attention and trying to get their way, just completely ignore them, no contact, then they will see that they are getting nothing from it and stop. If they break a rule during the tantrum, like hitting, breaking things, or disrespectful language, punish them, put them in timeout for 5-10 minutes, but dont start the clock until they have calmed down, that way they will learn that the longer they throw a tantrum, the longer they stay in timeout, then when they are calm, start the time, and when it is up give them a talk about how they way they acted was extremely unacceptable, talk to him about better ways to handle anger and frustration, like taking a few deep breaths, and move on.