Religion, Charity, and Taxes
Give generously to him and do so without a grudging heart; then because of this the Lord your God will bless you in all your work and in everything you put your hand to. There will always be poor people in the land. Therefore I command you to be openhanded toward your brothers and toward the poor and needy in your land.
http://www.gotquestions.org/tithing-christian.html
Islam has therefore made charity, that is, zakat, obligatory and binding upon all those who embrace the faith.
http://www.alrisala.org/Articles/mailing_list/charity.html
Tax is a sum of money demanded by a government for its support or for specific facilities or services, levied upon incomes, property, sales, etc.
http://dictionary.reference.com/browse/tax