To see your current listings, you can go to Listings > Listing Management > Active Listings. Here you can filter your listings by sales channel and search on products to see the corresponding listings.
This screen displays your listings based on the last time you downloaded your listings. To get a fresh copy of your listings, you can click on the Download Listings button which will import a new batch of your active listings.
Within the Active Listing tab, you can submit price adjustments and update additional attributes on the live listing. Once your updates have been made, click "Submit Revision" to update the storefront.