You will need your gift card code, which is included as an attachment in the gift card email you received. It should appear as a series of 12 numbers spaced with dashes (ex: Z50-Y6K-COS-402).
During checkout, there will be an option to add your gift card under Payment Method or click "Promo/ Gift Certificate" in Order Summary on the right of the checkout page, and enter your 12-digit gift card code.*
* Gift cards are only redeemable for store credit on organicstart.com. Gift cards purchased on organicstart.com are valid only on Organic Start Retail and can not be used to purchase other gift cards. Gift cards can not be applied on Organic Start Wholesale or other affiliated stores.