Both is correct? 你认为如何 and 如何你认为 你认为如何 - More like a Chinese guy would talk like that.
如何你认为 - Feels like the English sentence. *Like the sentence start with &quot;What&quot;, &quot;Which&quot; etc.
So both is correct?
Especially to express:

What do you think...
你认为如何
如何你认为


The first is correct but the second is wrong.
However, even with this said, you may hear the second sentence from native speakers in casual conversations. As I mentioned in this answer, some people tend to reverse orders while speaking. For example &quot;山东人我是&quot;. But don't get me wrong: this sentence is not correct and you should not say the same. However, just don't be surprised if you hear some native speakers make the same mistake.