[Model 800]

You are usually taxed based on your place of residence, not the place of residence of your clients. Hence, you would need to report any income according to the tax code of your home (or residence) country. That being said, some people never "establish" a permanent residence in any country long enough to be considered a resident for tax purposes. This can work for some time but is expensive and difficult in the long run. Countries track your travels and will automatically establish your residence status based on the time spent in any one of them. A better option is to physically establish oneself in a low-tax (or better yet, no foreign income tax) jurisdiction and work from there. With internet-based work that is quite feasible. In any case, diligent research is in order before any concrete decisions are made.