To create the Sibling Discount: 

• Go to the 1 Setup page of the Program and select Across Programs or Within Offering.
• Enter the Sibling Discount dollar amount.

Note: if you wish to exclude a specific Offering from the eligible discount, go to the 2 Configuration page and edit that Offering. Check the Disable Sib. Discount checkbox and the Offering will not be included in Sibling Discount calculations. 

There are two types of sibling discounts on the 1 Setup page "Sibling Discount Type" drop down for a Youth Registration Program.

"Across Program(s)"

Most commonly used even if just one Program is being setup.  If you want to enable the Sibling discount across multiple Programs, select this value for "Sibling Discount Type" and click the "Click here to link programs" link to setup the Programs you want to include.

"Within Offering"

For the "Within Offering" option only siblings registering into the same Offering will get the discount. If siblings registered into different Offerings they would not get a discount.