From now until March 31, 2020, Jack in the Box is offering 25% off all orders placed through their mobile app. That discount applies to your entire order and can be used on any and all menu items. All you need to do is place the order on the Jack in the Box app.
Just remember that you're going to need your 25% off Jack in the Box meal to go as dining rooms are closed due to the COVID-19 virus outbreak.
The Jack in the Box 25% off deal is available nationwide at participating locations through the end of March 2020.