Is it correct to say what do you have planned?

Answer 1

Yes, it is correct in the following type of construction:

'What do you have planned for this afternoon?'

It means the same as 'What have you planned for this afternoon?' or 'What plans do you have for this afternoon?' or 'What have you got planned for this afternoon?' or 'What have you planned to do this afternoon?'

Answer 2

Yes, it is correct to say "what do you have planned?" This is a grammatically correct way to inquire about someone's upcoming activities or events.