避税港的英语是tax haven 还是tax heaven?

tax Normalized Income Before Tax 中的Tax指的是所得税还是营业税? 英语高人帮下哈!tax credit 的意思! tax shield 和tax shelter的区别 business tax & income tax的意思 tax payable和tax liability的区别? 英语lodge tax return 税率是the percentage of the tax 还是 the tax rate 顺便问一个问题啊,汽车税是car tax,cars tax .还是taxes? tax clearance是? 美国的tax season tax credit 的意思!