Student or Learner
Have you (eaten /ate) all your dinner?
Welcome to the forum.
Are you asking us whether "Have you eaten ..." or "Have you ate ..." is correct?
Do you have a grammar book? Have you looked up the verb forms of "to eat"? Check the second person plural, present perfect, form.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.