Jizya is only for non muslims.As to tax collection ulemas have debated about it.Some state that if tax is collected to be spent purely ob the welfare of people and nation building then its halal.Consider if we dont pay tax to the government;how will we maintain a standing professional army and in the absence of proper defence system our enemies will anihiliate us.This debate has to be considered from different viewpoints.A member well versed in islamic law can shed detailed light on this subject.