This did change. You can fill out a form with your mass taxes and it will ask you how many days you worked in mass versus how many days you did and it pro-rates your taxes for you. Last year was the first year i did it and i received all the taxes back for the days i worked in NH. I am a NH resident that works in MA and teleworks from home. 50/50 split. I had my employer give me a document that shows how many days i was in NH versus MA. hope this helps.
here is the form:
https://www.mass.gov/doc/2023-form-1-nrpy-instructions/download
