Any sizable business should have an expert in tax law on retainer; a tax attorney is preferable, but an accountant may do in some cases. Since it's their duty to remain apprized of any changes in the tax code, you won't have to; plus, they'll be invaluable when tax time rolls around.

American tax law can be extremely confusing for foreign workers, especially if you're working in a high-the field that pays well, so it may be in your bet interest to hire a tax attorney to help you. The tax code is so complex that even most citizens don't understand it.

Remember: the tax code is intended, by and large, to benefit the government rather than you. A tax attorney, however, can tip the balance more in your favor, especially if you would like to keep as much money as you can. If you can afford one, a good tax attorney will be worth every dime.