rctour wrote:
OP, although you and many others want to act as Gipsies there is no such classification in the U.S. tax code, you have to be a resident somewhere, if you have taxable income. You have a PO Box, use that as your state or get a different PO Box. Keep in mind if you had your initial PO Box where your home used to be and it's a taxable state you might have to file as a part year resident, if you had and earnings.
I could go on with a bunch of other potential issues, but you get the idea.
US Post Office PO Boxes can not be used as legal addresses under the Patriot Act. You can use a business or residential address. Some states (like Tx) recognize the address from a mail forwarder (a business) as a legal address for residents. Plus insurance companies require an address where the vehicle is 'garaged', which would be your legal residence - that can't be a PO box, but could be a box at a UPS Store.
Barb