Unfortunately, there are no discount coupons for the 300-115 SWITCH exam. However, if you login to your Certification Tracking System profile, you can sign up to receive emails for some special offerings/promotions that may be available in the future.
Please note that from time to time, Cisco may offer promotions that target different audiences and have differing rules/time limits. To qualify, login to your Certifications Tracking System profile, then click on "Update Personal Info" on the left-hand side of the page. Select "Yes" to receiving emails about Cisco training, certifications, services, special offerings, and events, and then click Submit.
Good luck on your SWITCH exam!
Cisco Learning Network Moderator