State tax filing

So the company's address on the W2 is for MD, however, the company is located in DC. I rechecked the W2 and ONLY DC taxes were taken out. However, the TT program is saying I need to file with MD too. I cannot finish out my filings until I purchase the MD state form for non resident it says. However, I received no income from MD, Only DC. Does this make sense? I'm about to buy the MD state form, so please reply asap. Thank you.