I have lost all my information, invoices, sales and customer information. Is there a way to restore all of this?

You might want to check if your logged in to the correct account, info746.

On the sign in page, you'll want to click on I forgot my user ID or Password link. Enter your email address, user ID or phone number related to your login credentials. This will send a list of user ID linked to your email.

However, if you're logged in to the correct account and still not seeing your data, I recommend using the Audit Log feature. You can use this to search for the deleted transactions. Then refer to that information to recreate them.

Check this article for getting started with QuickBooks.

Stay in touch with me if you need further assistance.