Question

What type of sentence is what does everyone have planned for today

Answer 1

what does everyone have planned for today?

This has a question mark and asks the readers a question, therefore making it an interrogative sentence.

Answer 2

It is an interrogative sentence because it would end in a question mark.
"What does everyone have planned for today?"
It is also asking for an answer, which makes it interrogative.

Hope my answer helped!