I have a question similar to this one, with one difference: I'm going to be running my business while travelling the world over the next few years, both in the US and out. (I'm a resident of California.) What does "doing business" count as in that case? Do I still have to pay taxes in California, or am I free to register in any one state? (Or do I have to register in multiple states, depending on where I'm working at the time?!)
As I explained on my blog in When “Doing Business” isn’t “Doing Business”, it is important to understand the different meanings of "doing business":
Disclaimer: This information does not constitute legal advice and does not establish an attorney-client relationship.