I am getting the message below again and cannot find where something was changed. It only seems to be happening on one particular customer when I enter a payment and a taken discount .en.

Thank you for sharing the error message, Carol S1. Let me guide you how to fix this.

The reason for this matter is that you might happen to be in a Multi-user mode. Thus, be sure to switch to Single-user mode so that your payment will be saved successfully.  

Here's how: 

1. Open your QuickBooks Desktop. 
2. Go to the File menu located at the top left corner.
3. Choose the Switch to Single-user Mode. 

You can also view this material to learn more about the limits of Single-user Mode and Multi-user Mode: Features available and tasks you can perform in a single or multi-user mode in QuickBooks Desktop. 

Furthermore, you may want to learn more about how to create and manage repeating transactions in QuickBooks Desktop: Create, edit, or delete memorized transactions.

If you have other questions, feel free to hit the reply button. We're always around if you need our assistance. 

There are up to 6 people in this company at one time so going to single user mode really isn't much of a viable solution to this issue for us. Is there any way I can remove said error message?

The gentlemen I work for have 6 companies and all 6 are in multi-user. I am in and out of all 6 almost daily and many times in a day,

Thank you for getting back to us, @Carol.

A data issue with your company file causing this behavior might be one of the reasons why you can't create your invoice. Let’s fix your invoice matter by verifying rebuild tools in QuickBooks Desktop (QBDT).

The verify tool locates the most common problems in a company file, and the rebuild tool fixes them.

Start by verifying your company, here's how:

1. Go to Window, then select Close All.
2. Go to File, then choose Utilities.
3. Select Verify Data. If you see:

• QuickBooks detected no problems with your data — your data is secure, so you don't need to do anything else.
• If you see an error message – you can search on our QBDT support site to learn how to fix it.
• If your data has lost integrity – damage to your data was found in the file and we have to rebuild your data.

If you need to rebuild your company file data, kindly follow the steps below:

1. Go to File, then select Utilities.
2. Click on Rebuild Data.
3. Follow the on-screen instructions, then press OK.
4. Select the place where you want your backup file to be saved, then tap OK.
5. Enter a new name in the File name. Click Save.

Check out this article that provides detailed guidelines on the steps I provided above: Verify and Rebuild Data in QuickBooks Desktop.

Additionally, you can check out this video reference on running and customizing reports in QuickBooks Desktop (QBDT.

Let me know if you have other concerns or questions with your QBDT invoices. I’ll be here to assist you at any time.  

Why won't the "window" this message is in go away after I hit Okay?

Hey there, Tobey.

For us to provide an appropriate resolution to the problem you've encountered, we need to ask you a few questions.

Firstly, can you specify what kind of window message you're referring to?

Additionally, what errors have you encountered while using QuickBooks Desktop (QBDT)?

Feel free to drop some comments below. Your response would highly be appreciated. Please know that we're always here 24/7 to offer assistance. Stay safe.