The only recourse is to mark the Active listing Withdrawn so no other user sees it as Active (it is best to do this as soon as you realize your mistake) and then clone from that listing to create a new INC listing (with a new list number). We can also copy the photos over from the WITH listing to the INC listing (unfortunately we cannot copy over the paperwork, so you will have to upload that yourself).
You can then upload all of the necessary paperwork, including the Coming Soon addendum, while the listing is still in the INC status. Finally, go in and switch the listing from INC to Coming Soon (with the appropriate dates, list price, etc.).
SmartMLS staff will delete the WITH listing completely, so no one will ever see it.
If this happens to you outside of SmartMLS business hours, the best thing to do is mark it WITH as quickly as possible (to try to limit the number of users/clients who might see it as Active). Then either send us an email (firstname.lastname@example.org) or leave us a voicemail (203-750-6000) explaining what happened so we can deal with it first thing the next business day.