Ring In The New Year With FREE Tacos At Qdoba On January 1st! December 31, 2015 by Couponer Post contains sponsored/affiliate links and I get commissions for purchases made from links. Start 2016 off with free tacos! Get a FREE Knockout Taco from Qdoba tomorrow, January 1st! Head to the location nearest you and spend the first day of the new year eating delicious tacos for free!