I have just loved over from the old self employed quickbooks app to the quickbooks small business and after the data transfer I am missing 2 months worth of invoices.

Hi there, Luminelectrical. Have you tried filtering the invoices and setting the date range to include those two missing months in QuickBooks Online (QBO)?

If you haven't yet, log in to your QBO account and navigate to Sales & Get Paid > Invoices > Status > Date to sort invoices.

If you're still unable to access those invoices in QBO, log in via https://quickbooks.intuit.com/uk/login/ using the QuickBooks Self-Employed option to export your invoices and save them to your device.

When ready, you can then import them into your QBO account. Check out this article for a detailed guide: Importing multiple invoices at once in QuickBooks.

I'll keep this conversation open if you have additional questions about QuickBooks.