How to generate report for open invoices at specific date.

Hello Abefarber, 

Welcome to the Community page, 

if you go to Reports> Customers & Receivables> Open Invoices then you can customise it by date. 

Hello there, @abefarber.

You only need to customise the report to show the paid invoices. Let me show you how:

1. Pull up the Open Invoices Report. 
2. Click the Customise button.
3. In the Filter section, tick the A/R Paid box. Then, select Paid.
4. Make sure to include all the details you need to generate on the report.
5. Set the reporting date correctly. Note: Make sure to select dates when the invoices are created. It doesn't matter when the invoices were paid. It'll still show up on the report as long as you select the created date.
6. Click Run report to reflect the changes.

Here are the sample screenshots:

That will do. You can check these articles to learn more about handling reports in QuickBooks Online (QBO):

• Customise reports
• Memorise reports

If you have more concerns, please let us know. I'm here together with my colleague to help you more. Take care and stay safe, abefarber.