If you are looking to add a discount code to your registration form:
1. Go to the Registration tab
2. Click 'New Registration'
NOTE: If you already have a registration form made, click on the form from this tab and then click the 'settings' button
3. Make sure to check 'Yes' under the 'Include Discount Codes' section
4. Click 'Add Discount'
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.