To make changes to a release, just make the modification (as long as it is allowed by the channels) and forward the disc to the same originally selected channels.
To do this, you must enter the release, go to the "6. Distribution" tab, and select "Update on all channels".
Keep in mind that if you make changes to the album title or artist names, these should also be reflected on the cover.
The process is the same as that of a distribution order, but in this case the system will automatically detect that it is an update. For this reason, the order will show you the "U" for Update instead of the "D" for Distribution.
The Update terms are from 2 to 10 working days.