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, D.C. has been the capital of the United States since 1800. Eight other cities have served as the meeting place for the U.S. Congress and are therefore considered to have once been the capital of the United States.