UI tax 的翻译

请翻译:tax 翻译double tax treaties tax cut如何翻译 statutory tax怎么翻译? profit pre- and post-tax 的准确翻译 tax shield 和tax shelter的区别 business tax & income tax的意思 tax payable和tax liability的区别? tax & duty free怎么翻译 pre tax income怎么翻译? 美国的tax season tax credit 的意思!