Thank you for connecting with the QuickBooks Community! Once an invoice is deleted, it is unavailable. However, you can recreate the invoice, and if you need the details, you can also run the audit log for confirmation. For QuickBooks Online, here's how:
To pull up the audit log report:
Go to the Gear icon and then choose Audit log.
Click on Filter and select Show only these events, Transactions, and Deleted/Voided transactions.
Look for the deleted invoice and click View under the History column to get all the necessary details.
After that, click the + New button and select Invoice. Then, enter all the details and click Save. You can check out this link for more information: Use the audit log to re-enter deleted transactions.
For QuickBooks Desktop, you would need to recreate the invoice and use the audit log as well.
Let me know if you have additional questions or concerns! We will be around to assist! See you soon.