If you have a promo code, you can add it to your account through the billing section. To add a promo code to your existing account, take the following steps:
Step 1: From your account dashboard area or any other section, locate and click on your profile name at the bottom left corner of the page.
Step 2: Select Billing from the options that pop up around it.
Step 3: Navigate to the Add Promocode button at the top right corner of the page and click on it.
Step 4: Input the promo code into the box and click Redeem below the form.
The code should immediately be registered/added to your account.
