You can file a ticket to request any of the following be changed if you have already delivered your content to the iTunes Store:
*Can only be changed for songs
To edit your territory rights, wholesale price tier, and sales start date for music albums, or to remove an album from being offered for sale:
You can update the following for music albums only by submitting the album again with iTunes Producer:
The following items can't be changed or deleted after being submitted to iTunes:
To change album or track metadata, album cover art, audio, music video metadata, or music video cover art, go to My Music on iTunes Connect to file a ticket.
You can view your Tickets on iTunes to track their status.
To make a rights and pricing change on music content, search for the content in My Music and click Edit Rights & Pricing. Rights and pricing change are immediately reflected in iTunes Connect.