If you are married, then you and your spouse can file separate tax returns. The married filing separately (MFS) filing status is generally perceived as the least beneficial of all the filing statuses.
In 1783 Congress decided to create a new capital apart from any state, and in 1787 the framers of the Constitution provided for a capital district. The U.S. capital was originally Philadelphia. Washington D.C. became the new capital on July 16, 1790.
Washington DC was founded in 1790 and designed to be independent of any state. The District of Columbia (DC) is outside of the states of Maryland and Virginia, the states that donated land for the site.