Details and invoices have gone for account how do I recover

Hello, liambkr. 

Thank you for reaching out to the Community.  

I believe this post is a duplicate and one of my colleagues already answered it. Let me route you to the original post. Here's the link below:  

https://quickbooks.intuit.com/learn-support/en-uk/transactions/re-my-invoices-have-disappeared-how-do-i-get-them-back/01/1102135#M17261.  

Additionally, I’ll share with you this article to help you manage your transactions in the future: Export data, reports, lists, and more from QuickBooks Online.

Don't hesitate to visit the Community if you have other concerns. We're around to help you out. Take care!