The short answer is no. The long answer is, you have to check with the State.
https://www.usexpattaxhelp.com/Expat-State-Tax-Return.phpMaybe one further question: is your friend a US citizen? Green Card holder?
I'm sure if you were on a student visa or something, there is no need for ongoing commitment to a state. But for a citizen, or someone looking to maintain their green card status, it is indefinite.
Even residency among states is subject to some interpretation. But if your friend has retained a driver's license or has voted in a state, those are significant pieces of evidence on residency. (and significant pieces of evidence that you have moved) But even bank accounts, property (real or items in storage), etc. could count.
As an example, here is the detail for Michigan:
http://w3.lara.state.mi.us/GSA_Indexed/ORR/1613_2016-006TY_AdminCode.pdfR 206.5 Residency; determination guidelines.
Rule 5. (1) A person who is domiciled in this state is a resident of this state. "Domicile" means the fixed, permanent, and principal home to which a person, wherever temporarily located, always intends to return. A person may have several residences or dwelling places but only may have 1 domicile at a particular time. Domicile, once established, is not lost until there is a concurrence of all of the following:
(a) The specific intent to abandon the old domicile.
(b) The intent to acquire a specific new domicile.
(c) Actual physical presence in the new state of domicile. Generally, the domicile of the wife follows that of the husband.
(2) To overcome the presumption of residency, as stated in subrule (1), a taxpayer shall present detailed factual data to the department. Factors to be considered in determining a taxpayer's residency or domicile include where he keeps his most important possessions, houses his family, votes, maintains club and lodge memberships, buys automobile licenses, maintains a mailing address and banks, operates a business, or sues for divorce. However, no one of these factors is controlling. The failure of a person to pay income taxes in the state to which he claims to have domicile is very significant.
(3) A person whose residency cannot be determined by the above guidelines shall be deemed a resident of Michigan if he lives within the state for not less than 183 days during the tax year or for more than 1/2 the days during a taxable year of less than 12 months. History: 1979 AC
And, for the purposes of establishing you have moved, here is Texas: (which does not have a state income tax)
https://www.dps.texas.gov/DriverLicense/residencyReqNonCDL.htmBut in any case, you are always a citizen of *some* state, at least as far as my research has shown. (for example, to vote you need to vote from somewhere; even if you register through the State Department at an embassy, they will ask for your US address to determine your voting district) To be a resident of *no* state is something I do not know how to do. Certainly, the publications and regulations are geared toward moving between states.