Answer:
Dependent clause
Explanation:
Look at the sentence ----> "When you want the report."
Heres a trick that you can use whenever a sentence starts with before, if, since, that, until, what, when, where, who, which, and why etc.
This means that its a dependent clause.
Also another way of why it is a dependent clause is because it doesn't express a complete thought.
In this case you want to know what happens next (curiosity)
Hope this helps!