Hi outdatedsoftware,

Thanks for joining the thread. The send later option in the invoicing page allows you to send the customer invoice on a later date after you create the invoice. You can run a report to view to be sent invoices in QuickBooks Online. Here's how:

1. Click on the Reports tab menu.
2. In the search box type in Transaction List by Customer.
3. Click on Customise.
4. If prompted to modern view report, click on Switch to classic.
5. Set a Report period, under Filter locate Sent and tix the box and then choose To be sent.
6. Click on Run report.

On the report you'll see the invoice you need to send to your customers. You can also save the customised report for future reference.

You can also check this link to learn more about how to: Customise reports in QuickBooks Online.

Feel free to reply to this thread if you have further concerns.