QB has changed my invoicing where I can not use the same invoice number across customers . Is there an override for this? I use to get an warning with an option to conti?

Let me provide some information about using the same invoice number for multiple invoices, Kim.

The old invoicing experience in QuickBooks allowed users to override the warning prompt when using the same invoice number. However, the option to utilize the same invoice number for multiple invoices is unavailable in the new invoice layout. With this, I recommend sending a product suggestion through the Feedback section. This will allow our product developers to consider adding your valuable insights in future updates. 

Here's how to send feedback in QuickBooks Online:

1. Click the Gear icon.
2. Select Feedback under the Profile column.
3. Enter your product suggestions.
4. Click Next to submit.

You can check out this article for more info on the new layout in QuickBooks Online: See what’s new with estimates and invoices.

Once you're done invoicing your customers, here's a guide on recording their payments: Record invoice payments in QuickBooks Online.

Come back to this post if you have any other invoicing concerns in QuickBooks Online, Kim. I'm just one post away to assist you.