Not sure what you think using a post office box has to do with it. If you work in one state and live in another state then it is entirely possible to pay tax to the state you work in and to the state you live in. It also depends on the state(s) you are asking about. There are several states that do not have a state income tax, and there are states that have reciprocal tax agreements with each other.
If you live in a state with a state income tax, and work in a state with a state income tax, you should prepare a NON-RESIDENT tax return first for the state you worked in, and then prepare a state return for the state where you live. That way you get credit from one of the states for the tax paid to the other one and are not "double" taxed.
We can be more helpful if you provide details as to what state you live in and what state you work in.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
