I moved out of MD when I joined the Army 30 years ago. Of course, since I entered the service from MD I had to continue to pay MD taxes even though I had NOTHING in the state. I was a 17yo kid.
Finally after several years of paying MD taxes I sent them a letter asking them why I had to pay since I had no ties to the State.
They had the gall to tell me that even though I owned no property in MD I was now paying the State back for all those years of services they provided to me when I was growing up.
I kid you not.
I assume this is because you kept your legal residency as Maryland.
Maryland has lots to do drawing more and more people and lots of federal $$$$ but retiring here is a loser.