"Who needs help" is how you'd say it. 

Bennett is right. In English, people say "Who needs help?" They also sometimes say "Who needs a hand?" or "Do you need a hand with that?" 

<a ui-sref="user({id:comment.commenter_obj.id})" href="https://www.italki.com/user/1101147" style="background-color: rgb(255, 255, 255); color: rgb(149, 149, 149); outline: 0px;">tempus.edax.rerum</a> I know that in this case you are right,  but I ask what form is appropriate when you make question to group of people for example on this forum. What form I should use. Who needs help or who need help?. I ask group of people but I will offer help individually.