Question about state of permanent residence during residency

Starting AD residency soon and preparing to move. Throughout medical school I have been able to keep my state of permanent residence in a state without state income tax (using my parents' address); is it possible to keep my "permanent residence" in a different state than my medical residency or will it have to be where I am stationed? Also, I completely understand if I cannot - I just don't want to miss out on lower taxes if I don't have to.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Military Medicine Source Type: forums