Hello everyone!
I've got a question, I have to play some song for the musical at school.
But we've to play a #E, I really don't know which note this is.
And I can't find it on the internet, is there anyone who can help me?

Thanks!

For all practical purposes, an E# on a flute would "sound" like an F natural. Therefore, use the fingering for the F natural just above the E# you are trying to play.

Ok, thank you very much, and by a b# it is the c than?

Yes. And F flat is E & C flat B!

A complete flute fingering chart is easily downloaded from the Internet. It will show you all of the pitches and their notational equivalents (for example, F equivalent to E#).

On all the flute fingering chart I find, I don't see the E# is the F and the B# is the C, only the other notes.

http://www.wfg.woodwind.org/flute/fl_bas_2.html

http://www.cgconn.com/pdf/Flute%20and%20Piccolo_Armstrong.pdf

Many fingering charts don't include these less rare enharmonics.
Learn the chromatic scale and remember that the sharp raises a note 1/2 step or to the next note up the chromatic scale. The flat lowers the note 1/2 step or to the next note down the chromatic scale.

Don't fall into the convenient trap of saying (or teaching) that these enharmonics (such as D# and Eb) are "the same note." On the flute, it is right to say that they are only the same fingering. There are very solid reasons for not making this mistake.

And don't forget the double sharps and double flats which raise/lower a full step.

e.g. C## = D
e.g. Bbb = A