Hi MikeCA3,
Let me show you how to change the sorting of invoice number on your reports.
- Go to Reports tab and select a report or you may choose Invoice List report.
- Click on Sort drop-down menu.
- On Sort by drop-down menu select No.
- On Sort in, select whether you would like the invoice number show in Ascending order or Descending order.
Please note that the steps provided above only applies when you generate a report from the Reports tab.
For your reference, you can check on this article on how to set up custom invoice numbers [Video].
Feel free to post your questions here in the Community if you need more help with QuickBooks Online.