I live in Delaware but work in Maryland. My employer's main office id in Virginia. They only withheld Delaware state taxes . Do I need to file md tax return?

I am a full-time resident of Delaware. I have worked in Maryland for part of the year. My new employer is based out of Virginia but I work in Maryland. They only withheld Delaware state taxes nothing for Maryland. Do I need to file a tax return with Maryland for the months I worked in Maryland, or just file Delaware?