Is it wrong to cite a source I did not use? I am writing a paper for an English class on a topic that I know well. for this paper, there is a minimum requirement for cited sources but I did not meet that requirement and was able to meet the length requirement for the paper.
Ask yourself: why did the Professor put this requirement?

It is almost certainly not just to make your life difficult.

A more likely explanation is that your professor wants you to not only provide your own analysis, but to back your analysis up with others' research and analysis.

So if you were to cite a source without using it, your mark won't likely go up, because your arguments are no better supported. Any good marker will see this. So if you're trying to increase your grade, you should add a source, and incorporate it into your arguments. In any case, I suspect your paper needs work to meet your professor's expectations.