Oh, please, no. Obviously, there are questions they can answer (the easy ones). They cannot write your essay for you, they cannot ask people for your recommendations—but they can offer guidance and assistance with your resume, and they can proofread your essay (highly encouraged).
We have had numerous situations where a parent uploaded the wrong essay or resume to the wrong child’s application, or where their e-mail was used for multiple children, and then they do not know whose application is missing what material. We’ve also had parents put their own name as the applicant, causing immense confusion. It’s not that hard and the Scholarship Chairperson is very friendly and helpful (but parents and grandparents can, will, and should nag you).