Sales Receipts and Partial Payments

Applying the customer's balance to a sales receipt isn't possible, RPNicholas.

When a sales receipt is issued, this means the customer has paid immediately for the products or services. You can't apply the remaining balance of the customer on it. 

Instead, we can deposit the payment affecting the Accounts Receivable (AR). After receiving the payment, apply any unpaid balance and refund the remaining amount.

Here's how you can deposit the payment to the AR account:

1. Click +New.
2. Choose Bank Deposit.
3. From the Account dropdown, choose the AR account.
4. Record the deposit of your customer.
5. Select Save and close.

Here's how you can add or write a check for the refund:

1. Click +New, then select Check.
2. Choose the customer you want to refund from the Payee dropdown.
3. From the Payment account ▼ dropdown, select the bank account to which you deposited the overpayment.
4. On the first line of the Category column, select Accounts Receivable.
5. Enter the $815.00 in the Amount field.
6. Complete the other fields, and Hit Save and close.

Moreover, I'll share an article to help you group multiple payments into a single deposit: Record invoice payments in QuickBooks Online.

If you have additional questions about managing payments, leave a reply below. I'll be here to assist you. Take care!

@RPNicholas 

I'm not sure that @CamelleT 's advice will help since you already used a sales receipt to record the deposit and a sales receipt item cannot be mapped to A/R.

What Product/Service did you use on the sales receipt?  Was it mapped to a liability account?  If so, you can just write a check to your customer to zero out the deposit and create a credit that can be applied to an invoice.  On the check, enter the $146 owed to you as a negative amount and assign Accounts Receivable as the category.  On another line, enter $961 as a positive amount and assign the same account to that line that was assigned to the item on the sales receipt.  That will zero out the deposit account, record a $146 credit for your customer, and issue payment for the $815 difference.