One would only correctly insert the comma before the parenthesised verbiage if the comma would also be appropriate absent the parentheses. So, if you re-read the sentence, you'll see that no comma is needed, and have the delightful chance to make careful note of your error and perhaps learn a couple things.
1. No comma unless and until I say so.
2. As the good folks at Mensa can tell you, there are far more productive ways for you to waste your time than trying to correct my grammar and punctuation. You errantly arrogant tit.
;-/
Thank you and Happy Thanksgiving. (Tell Mensa hello)