Hello @stuartwi.

I can see how the last function benefits how you manage your invoice. Recent changes, especially when a feature is removed, can affect how we use the program. 

I'd like to lay down some information about how we can see if an invoice is sent in QBO. 

I see that you are using a Modern view for the Invoice list report, which doesn't have the Sent column, as you've noticed. 

We'll want to switch to the Classic view to add the Sent column to the report. 

If you need help with the navigation, we'll want to follow these steps: 

1. On the Invoice List report, click the Switch to Classic view button.
2. Click Customize.
3. Expand the Rows/Columns section.
4. Click Change columns and tick the Sent box.
5. Click Run reports.

Although, we want to hear your thoughts and suggestions about the Modern view option. If you need those classic columns on the new interface, we can send feedback to our developers.

If you haven't already done it yet, here's how to do it:

1. Click the Gear icon.
2. Select Feedback.
3. Enter your comments, then hit Next to submit your feedback. 

If you need help recording your invoice payments, we can take a look at this article as a guide: Record invoice payments in QuickBooks Online 

Let us know if you have more questions about invoicing or running reports.