❝Hi there, Go to ORDERS and select the relevant item.

Next to the tracking number you have entered is an edit tab, use that and from there you should be able to add the second (correct) tracking.  From memory you won't be able to remove the original tracking that was added, unless ebay have changed it.❞

… and lezned-toycollector posted:

❝There are 3 options - depending on how you are accessing the eBay site.

1. Mark as unsent, then add tracking using the correct number

--or--

2. Add another tracking number, then delete the incorrect number

--or--

3. Edit the tracking number❞