Do NOT incorporate in another country if you are a US citizen if your only reason for doing so is to to save on taxes. All foreign-derived income is taxable if you are a US citizen (with VERY few, VERY specific exceptions), so incorporating in a tax haven to save on taxes isn't tax avoidance, it's tax evasion. Avoidance is legal, evasion is illegal.
Setting up a foreign subsidiary should be the only reason you should incorporate in a foreign country if you're a US citizen, and even then only with professional help. There are relatively few tax 'loopholes' that involve tax haven countries anymore, and even they are rather borderline legally and rather complicated. (If you sell physical goods, for example, there are some transfer pricing structures that can save you a bit - but it's only worth it at a certain level of business.)
As rms noted, if you ever get big enough for this to really be a concern it will be easy to find advisors to help you out. Even then, I would advise caution. All of your tax attorney time should be spent maximizing your US deductions,etc. - NOT looking for tax haven gimmicks. Better yet, focus your time on finding new customers and revenue streams. I personally wasted far too much time worrying about tax shelters and similar things when I was younger and I regret it. My time would have been much better spent working on my business. I don't like to see anyone else make the same mistakes.
Do NOT incorporate in another country if you are a US citizen if your only reason for doing so is to to save on taxes. All foreign-derived income is taxable if you are a US citizen (with VERY few, VERY specific exceptions), so incorporating in a tax haven to save on taxes isn't tax avoidance, it's tax evasion. Avoidance is legal, evasion is illegal.
Setting up a foreign subsidiary should be the only reason you should incorporate in a foreign country if you're a US citizen, and even then only with professional help. There are relatively few tax 'loopholes' that involve tax haven countries anymore, and even they are rather borderline legally and rather complicated. (If you sell physical goods, for example, there are some transfer pricing structures that can save you a bit - but it's only worth it at a certain level of business.)
As rms noted, if you ever get big enough for this to really be a concern it will be easy to find advisors to help you out. Even then, I would advise caution. All of your tax attorney time should be spent maximizing your US deductions,etc. - NOT looking for tax haven gimmicks. Better yet, focus your time on finding new customers and revenue streams. I personally wasted far too much time worrying about tax shelters and similar things when I was younger and I regret it. My time would have been much better spent working on my business. I don't like to see anyone else make the same mistakes.