@dawn-carlisle80- --
The answer to your question is "It depends."
Pennsylvania, like a few other states, has a "convenience of the employer" rule for taxation of non-resident remote workers. Basically the rule is that if you are working from another state for your own convenience, rather than for that of your employer, then your income is taxable by Pennsylvania. Here is the wording of PA's rule:
"Pennsylvania, like many other states, follows the “convenience-of-the-employer” doctrine. It provides that compensation for services performed by nonresidents cannot be allocated to the services’ actual places of performance if they were performed there only for the employee’s convenience or if they were not performed there “of necessity in the service of the employer”."
https://www.revenue.pa.gov/FormsandPublications/PAPersonalIncomeTaxGuide/Pages/Gross-Compensation.as...
Bottom line: if you're working remotely for your own convenience, your work income is taxable by both states. (It is taxable by MA because MA taxes all the income of its residents, regardless of the income's source.) In this situation you'd be able to claim a credit on your MA return for the taxes paid to PA on the income taxed by both, so in effect you wouldn't be double-taxed. But you would have to file a return in both states.
If you do have to file in both states, then in TurboTax be sure to complete the non-resident return first, before the home state return, so that the problem can calculate and apply the credit.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
