To redeem coupon codes on Laura.ca, follow these steps:

1. Log in to the account.
2. Add desired items to the shopping cart.
3. Proceed to the checkout process.
4. Under the payments section, find the "Add Promo Code" box.
5. Paste the coupon code and click "Apply".

The discount from the coupon code will be applied to the order and deducted from the total amount. If the coupon code doesn't cover the full order amount, the remaining balance can be paid using the preferred payment method. Remember, coupon codes are only redeemable by the person whose name appears on the account and they are non-transferable. If all the coupon codes are not used in one transaction, the remaining balance will stay in the account until they expire. Happy shopping!