By 1st July Packing Partner will be able to handle IOSS numbers.
Not all platforms and carriers are up to date with this, so we will add details as we get them.
Ensure you are using at least V220.127.116.11 of Packing Partner click here to download.
Please see our help page for details and setting up Packing Partner and Click&Drop.
Unfortunately Click & Drop have made this very awkward, but it's how they have implemented it. The only suggestion we have, is complain to them.
Platforms that have implemented IOSS and are supported by Packing Partner are: