Add items to your cart and continue through checkout to the payment step.
Click Apply a credit from your account.
In the Account Credits window, review the credits available for your cart — each shows a Note, Credit Balance, Available to Order, Expiration, and any Limitations.
Click Apply Credit next to the credit you want to use.
If a credit can't be used on this order (for example, it's restricted to a specific program), it will show Not Applicable to Cart instead of an Apply button.
If your credits cover the full order, you'll see No Payment Due — no payment method is needed; just continue to complete your order. If a balance remains, choose or add a payment method and complete checkout as normal.
NOTES:
You'll only see Apply a credit from your account once you reach the payment step of checkout. Earlier in checkout, you'll see a note that credit can be applied in a later step.
Applying a credit uses its full available amount toward your order in one step — you can't enter a partial amount. If the credit is worth more than your order, only what's needed is used; if it's worth less, the remaining balance is still due.