How do I apply the loyalty discount to my returning customers?

[Soulja]

Well I have some returning customer's and they have two or more stars. They receive a six digit code and is told to give me their phone number on their next visit. How do I apply their discount star to their next order?

[VanKalkerFarms]

This article should give you the information you need. 

https://squareup.com/help/us/en/article/5522-apply-rewards-to-purchases