Thank you for the snapshot you added, @tlehman1. This gives me better insights into your concern with changing the invoice amount.

I can see that you’re using QuickBooks Payments. With this, I’ll share with you some information on how we can sort this out.

Customers can automatically pay the invoice online by clicking the Review and pay button. Also, before sending this to your customers, you have the option to change the amount that they will be paying. To modify, you can follow the guidelines seen in the screenshot below:

If the customers are making a partial payment, you’ll want to know that QuickBooks Payments only allows one-time payment on invoices, either partial or full payment. Henceforth, you can adhere to the procedures listed below to add any further payments your client makes:

1. Go to the Customers menu and select Receive Payment.
2. Select the customer's name in the Received From drop-down. Then, enter the Amount received.
3. Choose the Payment method and ensure that the date is correct.
4. Select the invoice or invoices you'd like to pay. Then, select Save & Close.

Furthermore, learn from this article to check when QuickBooks deposits customer payments into your bank account: Find out when QuickBooks Payments deposits customer payments

Let me know if you have questions about invoice payments. The Community always has your back. Have a good one!