A capital gain on the sale of property located in MD is taxable by MD, regardless of whether or not you are an MD resident. So if you had a capital gain on the sale, you must file a non-resident MD return in addition to your home state VA return. The gain is also taxable by VA, but you'll be able to take a credit on your VA return for the taxes paid to MD, so you won't be double-taxed.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
