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On the BUZ to Xero screen there is a list of things that need to be setup for it to work. I have linked the Bank Account in BUZ for you already but the rest of it needs to be setup and I am not sure what the links are.
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Note:
You can not edit the accounts in BUZ, you can only import them from Xero.
If this does not solve the banking issue or for any other problems please email support@buzsoftware.com.au