To start using SuitePromotions, the feature needs to be enabled first
As Administrator, go to Setup > Company > Enable Features (Administrator), then on the Transactions subtab, Sales
Before enabling the SuitePromotions feature, the Promotion Codes feature must be enabled.
Check the Promotion Codes box.
Check the SuitePromotions box.
Check the Auto-Apply Promotions box (optional)
The Promotions subtab appears on sales orders, cash sale transactions, invoices, and return authorizations. In addition, the Coupon Code and Promotions fields no longer appear on the Items subtab.
NOTE:: SuitePromotions feature is not compatible with the Customer Center. Customers cannot open orders directly from the Customer Center when SuitePromotions is enabled.