Is it better to file as divorced or single? I have been divorced for many years. I am divorced and have no minor children.

You select Single.  Divorced is not a Filing Status.

Divorced is not a filing status for a tax return.  If you do not have any dependents then you file Single.

Doesn't matter.  They are the same thing.  They are both SINGLE.  Divorced is not a filing status. 

Yes, you should file as Single.

If you aren't legally married on December 31 and you have no dependents, Single is your only choice. "Divorced" isn't a filing status.