You can do so by logging in to your Songfinch Dashboard, clicking on your song, and scrolling down to the bottom of your song's page. At the bottom of your song's page, you'll find a carousel of song add-ons that are available for purchase. Once you add those items to your cart, simply check out and we'll be sure to get them processed as soon as possible!
Please note that this won't be available for purchase if your song is in-progress or in the process of revision, as your order is locked in during these periods.