Answer:
(Fatwa: 249/191=H/1429)
When you do not commit any haram or makrooh act in the tasks assigned to you, your salary is 100% halal. As far as the interest based loan taken by father is concerned, you should repay it back without delay as soon as possible.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
