All existing balances of any kind are entered against Opening Balance Equity. Let's start with your payables.
Security Deposits from customers that you hold are a Current Liability and you should have an account in your chart of accounts to record these to. If money is in hand it will offset a portion of a bank balance. You may even be required to hold these deposits in a separate interest bearing bank account.
Create a Deposit to banking and enter each security deposit with customer name. Once all are listed add a negative line item to Opening Balance Equity such that this deposit sum is now zero.
Receivables can be handled with a customer Invoice and an Item that posts against the asset being sold. The item, Asset1, is added with its affected account being the Asset1 account in your COA. Your business assets must be accounted for first.
This is where, with a general journal entry, you enter and list all beginning balances of assets as debits and liabikities as credits and the difference is posted to OBE.
