#1
How can i edit my contribution. How can i transfer the song from 1 artist to another or just delete my contribution so that i will be able to edit it? Thanks a lot..
#3
I don't think you can delete stuff. Is this a tab? If it is, then you can go to the very top of the page on the right where it says "My Account" and go in there. Find your tab and there should be a link that says "Edit" somewhere around it. Then you just submit the correct version.

Transfer something to the correct artist? Did you get the wrong artist on something? I don't know how you'd do that ...
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#4
There is an update option in the My Contributions section of your user CP next to each tab you submit. It is a blue 'U!'. I don't think you can change song name/band name there though, so your best bet is to PM/email those in charge of tabs (can't remember who it is off-hand though...) and tell them how you have screwed up.