I am currently paying taxes as a Kansas resident because this is where I last had a steady "home." But the last 2 years I've been a so-called "digital nomad", and have spent less than 10% of the year in the US, and only about half of that time in Kansas (the rest of the time was visiting family, or attending work meetings in other states).
Kansas income tax rates are relatively low, but there are some states with even lower income taxes (i.e. 0% in AL, FL, NV, SD, TX, WA and WY).
The only address I have "maintained" in Kansas has been my sister's mailing address, so any mail I receive goes to her. I neither own nor rent a dwelling in Kansas.
I'm wondering what would be required to change my tax residence to another state. What is the minimum time I must live in another state to change my residence status, for instance?
I realize it's fairly easy to pass the formal requirements for proof of residency, which often involve simply providing a bank statement or utility bill mailed to an address within the state in question. See for instance this wikihow article on obtaining Texas residency.
So my question is more about the implications beyond this. If I rent a mailbox in Texas, update my bank statements to be sent there, then get a Texas state issued ID, and immediately leave the state to travel Europe and Asia again, will I be violating any laws, or be suspected of fraud or other impropriety?