A student who is underage for getting driving licence goes to school by driving bike then he does a job and he got a job because of his study and will his income become halal or haram because he goes to study by driving a bike and it was illegal for him to drive underage as he broke traffic rules , he studied by going through breaking traffic rules so do his study and income be halal or not?
All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
Riding a bike without a license has no effect on the academic degree or on the job.
As long as he has obtained the certificate rightfully and worked in a permissible job while performing the required work in his job as due, then his earnings are lawful and there is no problem in it.
Allah Knows best.
You can search for fatwa through many choices