If you are looking at investment opportunities in the United States or expanding other business operations into the country, you need to understand how to work within the country's tax laws and reporting systems. That means understanding the various kinds of corporations that you might find in the country to handle your business interests as well as any restraints placed on their operation. Once you understand what to file and how to handle your tax and accounting obligations, it is much easier to plan to establish a company in the United States. Read on for clear, easy-to-understand answers to some of the most frequent questions asked by people in your position.