Why does Phaethon go to Apollos palace?

Phaethon goes to Apollo's palace to seek confirmation of his divine parentage. He wants proof that Apollo is indeed his father, as he faces skepticism and ridicule from others about his lineage. In the palace, Phaethon is granted access to Apollo, who ultimately reassures him and offers him the chance to drive the chariot of the sun, leading to disastrous consequences.