Just created a new CUSTOMER DEPOSIT account and want the deposit to calculate 50% of the invoice.

Welcome to the Community, steph-bespokehom.

You've come to the right place for assistance with QuickBooks. I'm here to help with the deposit in your Online account.

At this time there isn't a way for the deposit entry to calculate a percentage from the invoice. You may consider receiving a partial payment from your customer toward the invoice, and then depositing that amount. Here's how to receive a partial payment:

1. Click + New.
2. Select Receive payment.
3. From the Customer dropdown, choose the name of the customer.
4. From the Payment method dropdown, select the payment method (credit card, debit, PayPal, Venmo, or ACH bank transfer).
5. From the Deposit to dropdown, select the account you put the payment into. 
6. In the Amount received field, enter the amount your customer paid.
7. In the Outstanding Transactions section, select the checkbox for the invoice you're recording the payment for.
8. Enter the Reference no. and Memo if needed.
9. Select Save and close.

Once you've done that you're ready to make a deposit. I'm linking a couple of articles I believe you'll find helpful in this process:

• Record invoice payments in QuickBooks Online
• Add a deposit to an invoice in QuickBooks Online
• Record and make bank deposits in QuickBooks Online

With this info you'll be able to record a partial payment as a deposit. Please feel free to reach back out if you have any other questions. I'll be here to lend a hand.