How long before TT surgery should I quit vaping?

Every plastic surgeon has their own preoperative and postoperative protocols. The longer you can quit before the surgery the better, but I would recommend a minimum of 4 weeks before and two weeks after. Because a tummy tuck is an elective procedure their is no reason to push it and take unnecessary risk. You have the ability to plan in advance to ensure that you and your doctor have done everything you can to minimize their risk of complications and optimize your outcomes.  

No nicotine in any form with tummy tuck.  You have a high risk of skin necrosis, infection and blood clots in the legs if you have nicotine in your system.   Speak directly with your surgeon to get his/her instruction with this.   Glad you asked the question, but you should follow your surgeon's instructions.  Good luck!!