Answer
Jizya was a tax levied on non-Arab Muslims by the caliphate. It was collected by Al-Hajjaj, who was the governor of Iraq under the Umayyad Caliphate. The tax was intended to compensate for the fact that non-Arab Muslims were not required to serve in the military. Jizya was collected in the form of money or goods, and the amount varied depending on the individual's wealth and status.