I received a Christmas bonus (personal check). It was not reflected on my W2. Is this declared as income (self-employment)? If so, I am asked to enter (my) business info.

According to an answer posted on the Turbo Tax website, a Christmas bonus, which is not reflected on a W-2 Form, is to be declared as self-employment income.  Is this correct?  If so, I am asked to enter my business name, address, etcetera; however, I do not own a business, so how do I proceed?