I've got your back, @mhoblondet1.

When you create a transaction, QuickBooks takes the last number you recorded. It will automatically increment this number by one for each new invoice. Once you delete an invoice and recreate it, you can edit the transaction number in the Invoice no. field. You can use the old one that your customer has in his record. See the screenshot below for your reference.

Additionally, take note of the latest invoice number and update the transaction number for the next invoice that you'll be creating. This way, the program will automatically follow the sequence and post the correct numbers in the succeeding transactions. 

To learn more about invoicing numbers in QBO, check this article out: How to change the invoice number on sales forms.

Additionally, you might also want to read this article for future reference: Customize invoices, estimates, and sales receipts in QuickBooks Online. Here, you’ll learn how to personalize the appearance of your sales form.

Please let me know if there’s anything else you need help with by leaving a reply in this thread. I’m only a post away.