Both are correct, but the second usage is a little unusual. We usually say 'go over someone's head' - in the sense of consulting someone higher up in authority - without that person's knowledge or consent. For example, 'If I don't get a straight answer from him soon, I'll go over his head and speak the the director', or 'I'm really annoyed that he went over my head without even telling me.' This second meaning is common and natural, so it's interesting that the two members who speak US English did not recognise it. I've checked in US dictionaries and this meaning seems to be there. Could any other US speakers confirm whether this expression is used?

Hi there, Sentence 1 is correct. The expressions `be over my head` or `go over my head` mean that something is too difficult or strange to understand. Sentence 2. Because of the meaning mentioned above, this sentence is not correct. To keep your sentence similar, I would say ` You should go to someone above me. `

I agree with Monika

Su.Ki is correct, these are the common US meanings as well.

Yes your understandings are both correct. 1 this report is too confusing for me. Or 1 I can't understand this report. :-)