First, navigate to the Create Promotion screen.
When you click Create New Promotion, a window will pop up
1. Name the promotion
2. Enter a start date
3. Select how many days before the promotion expires
4. Enter the rebate amount
5. Enter the vendor (you can track up to 3 rebates in each promotion)
6. Identify if the rebate is effective on purchase
7. Select the promotion group that the specific promotion will use
8. Click OK
After you fill in the information and click OK, you will be brought to the pricebook, automatically, with all the items in the promotion group displayed with their current retail price.