You were married in 2010, that is your status for the entire year. You and your spouse could file separate returns if you so choose. You need to change your Social Security status asap because when the day comes that you want to retire, or have to retire, or just have to depend on ss income, unless you make a great deal of money on your own, you would stand to profit from your husband's greater income. Your driver's license is a state matter, if you keep your maiden name you have no name change to announce. You need to be sure you are legal on that matter. Some women do not file formally that they intend to keep their maiden names and it is automatically changed when the get married, or at least hyphenated.