OK so here's what I found online at Don Nelson's site. I'm going to severe all links with MA
when I move to England and as my only income will be a UK salary and some dividends from
mutual funds in the US it looks like I won't have to file an MA form.
Anyone out there done the same
http://www.taxmeless.com/index.htmlFrom Mr Nelson's site which is excellent.
"Avoiding U.S. State Taxes
Do not assume just because you moved out of the U.S. that your previous state of residence has no claim on taxing your income. Many states such as California, Virginia, New Mexico and South Carolina make it very difficult to give up your "tax domicile" in the state and require that you file state income tax returns (and pay the tax) even if you do not move back until years later. Some of the criteria that a state looks at to determine if you are a resident for state income tax purposes includes your driver license, if you register to vote there, if you maintain an address there, the location of your bank accounts, if you own or rent real property there, the license plates on your cars, and if you still receive utility bills in that state. There are many other factors used by state taxing agencies to determine if you are a resident, but they are too numerous to mention here. You must be careful to reduce or eliminate all indices of residency or your previous state of residency in the U.S. will come after you for state income taxes. You must carefully plan your departure from your previous home state both reviewing the laws and taking the actual steps necessary to prove to that state you no longer have a "tax domicile" there after you move abroad. If you do not, the taxes, penalties and interest later assessed by that state can be huge.
You do have to continue to pay taxes in a state if you receive rental income there or receive income from a trade or business located there, even if you are no longer a resident. Investment income such as from stock sales, dividends, and interest are not subject to state tax unless you live there. Pensions are no longer taxable in the state in which you earned the pension if you permanently leave that state.