Rafi are you gone mad. The tax called Jizya would be returned by the emperor if he couldn't protect his citizens from war. Mad chap a lost emperor wouldn't be able to pay back anything. A lost king is no longer a king. Which history did you study that a lost king will start refunding back taxes.
If U say so, then Aurangzeb should have returned back the jizya to many people in South because the Marathas more or less defeated him in many places. How much was returned.