You do not owe taxes in MD if you are working remotely from MA and have never done any of your work in MD. Here is a link to an answered question very similar to yours:
https://ttlc.intuit.com/community/state-taxes/discussion/teleworking-for-a-different-state-from-the-...
To get the taxes withheld for MD back you will have to file a nonresident MD return. Here is a link to the MD Comptroller 2024 return information: https://services.marylandcomptroller.gov/taxes/en/2024-individual-income-tax-forms?id=kb_article_vie...
Scroll down to the first boxes in the nonresident info and it tells you if you are a nonresident and what to file.
