The Single File was created in 1983.

Single File - album - was created on 2000-04-18.

You have the choice each year to file single, or if available, married jointly. If you file single, you each have to file a return.

A single file of pack animals, like camels, is called a caravan.

If you are considered single for tax purpose when the year ends, you can file as single.

Even if you get your final divorce decree at 11:59 pm on December 31, you can file as single. And, even if you are married, you don't HAVE to file jointly...you may use the "married filing separately status" (which is different than the "single" status)...and change it every year, at your election.