How do I apply an ACH or EFT payment to an open invoice since the funds have already been deposited into the bank account?

Thanks for visiting the Community today, @BrucarAdmin. I'd be delighted to guide you in applying your EFT and ACH payments to your open invoices.

If your online banking is already connected with QuickBooks, you can easily match the deposit to the invoice so it will be recorded in the system. 

Here's how: 

1. From the Banking page, select the bank and look for the deposit in the For Review tab.
2. Click the deposit and select Find a match.
3. Filter the Date range that includes the date when the invoice payment was created, then review the transaction and then click Save.

However, if your bank isn't connected to QuickBooks, you'll need to manually record the payment to your bank. Here's how: 

1. Open the invoice, then select Receive payment.
2. Select the payment method from the Payment method dropdown.
3. Choose the account you want to put the payment to from the Deposit to dropdown.  
4. Enter the Reference no. and Memo if needed.
5. Select Save and close.

You can also visit this article to see further details on how to categorize and match online bank transactions in QuickBooks Online.

Keep in touch if you need further help in matching your deposits with customers' invoices. I'll be here to guide you some again.