Recovering invoices deleted in error

Hi there, @Dawn_wyn71_.

The option to undo the action or recover the deleted invoice is currently unavailable.

As a workaround you can ask for the details being sent to your customer, then verify the details. Lastly, enter it manually and choose Save so that it will not be sent again to the customer.

I've added a screenshot for your additional reference:

I've included this article for your future reference about managing your tasks effectively in QuickBooks Self-Employed: QuickBooks Self-Employed Overview. This contains questions and answers that might be apply to you in the future.

You're always welcome to tag my name in the comment section if you have other questions. I'd be happy to answer them.