A. 1. Check expiration date: Ensure that the promo code is still valid and has not expired. 2. Enter the code correctly: Double-check that you are entering the promo code exactly as it appears, including any special characters. 3. Review terms and conditions: Some promo codes may have specific terms that must be met, such as minimum purchase amounts.

B. 4. Try different codes: If one promo code does not work, try using another code if available.