We have quite a lot of duplicate entries in our “Accounts” (suppliers and customers). We have accounts where they have multiple addresses or divisions of organisations. At the moment we open a new account for each address or division. I was told that we could have one account for each customer and add additional divisions or addresses for this customer under member organization.
If I add these accounts under member organisations is there a way I can import the associated information in the account e.g sales and quotes?
I wrote this a while ago, it might help you clear up the concepts… on the other hand, it might also be more complication than you need 
About your specific question, I don’t think you can do that from the user interface. With some code or some tweaking in the database, sure.
You can edit the relationships of some items to link them to a different account id (moving records from the parent account into the child account or vice-versa). But that takes some SQL (and make sure you have proper backups so you don’t ruin everything).