So PS should ship and then it adds tracking itself to the order, no need for you to manually enter the tracking onto the order. You should get an email to say "tracking has been added to 1 order". i would keep an eye on this though as i have experienced some delays in shipping and have had to chase tracking directly with them lately, but nothing really to worry about. I usually make the order on PS and pay for it, then go onto my etsy orders and mark it as complete, that way you don't risk a late dispatch or anything like that, PS add the tracking when its available but i'd still keep an eye on it. hope this helps.