Question

Les parents demandent à leur fils ce qu’il voudrait faire après son Master.

Hint:

When the question word and verb tense are appropriate in reported speech, the sentence may already be correct.

Answer 1

This sentence is already written in indirect speech.
It uses the interrogative structure “ce que” correctly.
The verb “voudrait” (conditional) fits the indirect speech tense structure.
No changes are necessary.