Once signed in, you can enter your BI number into your profile here, which will automatically wrap your B&H affiliate code around any B&H products that you add to your Kits.

To make sure that your B&H links are working properly, find a B&H product in one of your Kits and hover over the 'view on BH' button or copy the link address to get the raw link. You should be able to see your BI number within that link.