You can upload tracking in bulk into PSS via spreadsheet. Once tracking has been entered in PSS it will be passed along to the appropriate marketplace. There is a template available under Orders > Upload Tracking. There are only 2 required values, the Order ID (this is the PSS order ID) and the tracking number. This method is usually used for items that are drop shipped. You can process you drop shipments using the PSS Order ID as a reference with each distributor and pull a report from them once tracking has been provided and upload into PSS.