You will report the commission you received as income on your Schedule C and the amount of the donation on your Schedule A Itemized Deductions.
As long as the donation to the charity was simply a gift of money, it is considered a personal donation and not a business expense. If the donation to the charity was for the purpose of being a sponsor of an event and you got an ad in the event program for example, then it could be considered a business expense for advertising.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"