On some discount time, for your one-time purchaing discount, if you one-time purchased amount reach to the following amout, you can get relevant amout cash back:
Here steps for you:
1.Sign in with the email address and password you registered
2. Add the item to your shopping cart:
3.Click Cash Back button
4.Input the max amount you can get
5.Click "Apply", and then you can get the cash back.