Should he use bank interest to pay off taxes?

Working in administration supervised by a ministry that supervises taxes and customs

Can customs duty be taken from non-Muslims?

He is exempted from paying duties; can he allow others to buy goods in his name?

He told the students to pay money towards classroom renovations and he gives them grades accordingly

Giving a false statement about one’s salary to avoid paying taxes that one has already agreed to pay

Can taxes be counted as part of zakaat?