Yes, you do not need to include the Form 1040X that was generated without changes. There is no reference in the instructions to the Federal return being attached. In reference to the Massachusetts original filing:
Your amended return must include all schedules filed with the original return even if there are no changes to the schedules. Mail your amended return to the same address used for original returns.
2017 Massachusetts Form 1 Instructions page 7
2018 Massachusetts Form 1 Instructions page 7
Yes, update the address on the amended return so that any correspondence will be delivered to the accurate address, even though you lived elsewhere at the time of the original filing.
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