Thank you so much for your inquiry. Per our points/rewards page, https://www.redapplelipstick.com/points-rewards/ you can begin to use your points once you have accumulated at least 200 points.
The option to apply your points won't show in your cart until you have reached this minimum. If you do have 200+ points there will be an option to apply the discount by clicking on the "Apply Discount" tab. From there you can enter how many points you'd like applied, but keep in mind that it does have to be at least 200 or the system will kick the discount out of your cart.
I hope this helps!