As of now, we don't allow the user to edit split information after it has been added to your account. Please send us a message on the chat box with the title and new split information. We'll be glad to update this for you.
Pro tip: make sure to add any 'outside writers' or co-writers to your account first so that we can properly add the split percentages. Go to 'menu', 'songwriters', and then click 'outside writers' to do this.

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