This may vary by state, but as long as no fraud is involved, whatever name you want to use is pretty much up to you. Inform your DMV and bank. If more is required they will let you know.
It depends, to an extent on where you are in the world. But, in most places, you can call yourself what you like (within reason). Informally, you can often simply start using a new name, but there's...
It want be very expensive , you have to get it written at the gazzeted officer on a stamp paper , of the change of name, and you must also put it in the newspaper
In the US, the cost is about $150,...
One reason is that career women are often established under their maiden name and continue to use it for continuity, convenience and to avoid confusion with customers or clients. Another reason is...