How to get read receipts on invoices - no longer showing if viewed ?

Glad to have you here in the Community, @plumbsafesouthwe.

Before anything else, would you mind telling me more about what reading receipts on invoices are you referring to? I appreciate any details you can provide.

Furthermore, if you need to access invoice activity, I can help you check the status of an invoice. Please note that the new activity status of the invoice is not as detailed as before.

If you're using the new invoice layout, you can quickly find the activity section by following these steps:

1. At the left navigation panel, go to Sales then select Invoices
2. Choose an invoice and then click, a pop-up will come out from the right side showing the status of your invoice.
3. If you wish to see the status within the invoice, you can select Edit from the drop-down menu, under Action column.

Furthermore, here's an article you can check to learn how to record invoice payment in QuickBooks Online: Receive invoice payments in QuickBooks Online.

You can always tap me if you have additional questions with managing your invoices in QuickBooks, @plumbsafesouthwe. Take the best care always and have a wonderful weekend ahead!