How do you take a credit off a customer invoice that should not be there?

I'd be happy to provide some details about removing the credit from the invoice, Brian.

To begin with, you'll need to turn off the Automatically Apply Credits feature to prevent automatic credit application when creating or correcting invoices. You can do this by following these steps:

1. Go to Settings and select Account and Settings.
2. In the Advanced window, look for the Automation section.
3. Toggle the radio button for Automatically Apply credits to turn this off.
4. Select Save and click Done.

Once turned off, you will have the option to apply the credits to your customers at your convenience.

Moreover, to remove the credits from your invoice, you can edit the payment and then uncheck the applied credit. Here's how:

1. Go to the left navigation panel and select Sales.
2. In the Customers section locate the customer that had a credit that you want to take off.
3. Find the Payment that had a credit that you want to take off and select Edit.
4. Scroll down and uncheck the box of the credit you want to take off from the invoice.
5. Enter the accurate amount in the Amount Received field.
6. Once done, select Save and Close.

Additionally, there are several financial reports you can run to track your sales income in QuickBooks. They will show you helpful insights on the things you buy and sell, and the status of your inventory.

If you have any concerns about removing credits, please tag me in the comment section, Brian. I'll assist you in any way possible.