So what happens if someone makes and order, then on the thank you page
after checkout they add another product to their order (via upsell) will
this show up in Shipstation?
How is this still not integrated yet, all your main competitors have it!
https://shipperhq.com/ups_accesspoint
https://goshippo.com/blog/shippo-ups-ready-program-fedex-compatible-partnerships/
I'm considering leaving ShipStation just for this feature...