I'm of the opinion that you can deduct the "up charge" on Schedule C. If TurboTax Deluxe was adequate to handle your personal taxes, but you needed to upgrade to TT Self Employment because of your business, you may deduct the rice difference on Schedule C.
If the primary reason for purchasing Audit Defense was the business return, you can deduct that cost too. If there is anything complex about your personal taxes, you my want to only deduct a portion of the Audit defense cost.
