Hi, I am European, live here in Southern California, and will give up rent here and want to get an RV, trade from there and travel the US. I also have a company (LLC) registered in Nevada (my trading will run over it). As I realized, my quite okay tax related knowledge from Europe is nice, but as nice as it is, as worthless is it here in the States. Maybe some of you guys can give me some basic advice, maybe even in relation with my special circumstances: - What (income) taxes have to be paid/considered in the US in general? Is this split between country (if any) and state tax etc.? - As I will be not (necessarily) a Californian resident as I will travel fulltime and have no address here in Cali, where would it be best to become a resident in terms of taxes? - And how could I achieve that? In most European countries you have to get registered in the city you live, but not here, right? Btw, I got my California Driver License. Would it help to get an address in, lets say Nevada, go to a DMV for a Nevada DL, and declare my taxes there after the year is over? - Different taxation for stocks, futures, forex, ...? A brief overview would be nice as I will trade all of that. - Pension: as a trader and/or because I generate my income via my LLC, how could I best save money for retirement. I guess that 401k or however it is called is not for me? - Health insurance: As I understand, you just get it somewhere (f you like), which I did from a Californian insurer. I will ask them, but do I have to expect troubles while being in a NYC hospital because I got run over by a 23 year old Goldman Sachs banker in his new Porsche? If so, any "nationwide insurance". - Tax deduction: as I learned from my CPA and lawyer, I would have to pay sales tax for my RV wherever I get the title for it? I am not so sure if this is really true (as I will not stay in that or any particular state for a long time). But I guess I can deduct some interest for the loan (if I am not forced to pay all in cash -> no credit history in the US = no human being at all = no loan), as these are seen as first or second home under some circumstances? I know there is a lot of basic stuff, but I can tell you that specially the easy basics are sometimes harder to figure out as they are not discussed at all (as everybody know them anyway, beside some aliens from abroad), and I also know that parts of it for sure have been already discussed here but again, sometimes using common abbreviations I never heard in my life before! Thx!