How-to
Buying a course and using a coupon
In short
Open your checkout link, add your coupon code and see the lower price before you pay.

Open the checkout link your academy gave you.
Click Add a coupon code.
Type your code and click Apply.
The discount shows in your total. Click Remove to take the code off.
Click Pay to finish.
Good to know
Some offers have a timer. The price is held for you while the countdown runs.
If a code does not work, check for typing mistakes, then ask the academy whether the code has ended.