To add a discount code to your registration form:
1. Go to the Registrations tab
2. Click 'New Registration' or Edit an existing one by clicking its name
3. Go to the Discounts Section on the left
4. Click Add Regular Discount or Add Family Discount in the upper right
5. Fill in the information for your discount code and press 'Save'
You will now see the discount code listed on your registration form. You can now share this code and instruct people to use it if it applies.
When filling out the form, they will be prompted to use the code under the Review Section before their payment.