Hello @Rooney13 thanks for your post. Check out this thread with more discussion about using Square for consignment sales. I personally do not use consignments in my retail shop, but the best solution/easiest I've read about is making categories with consignment NAMES, and then assign items to those categories. That way you can track everything.
If you're looking for a more advanced software that can actually have your consigners manage their own inventory and allow you to mark items sold, there is a tool here: https://mvpofsales.com/
Just know that this is administered through a web portal, and I still think you'll have to run the payments through Square.
