Estimates vs sales order

I can share some information that can help you with generating the report that you need, @charlesmyf.

You can run a Transaction List by Customer report in QuickBooks Desktop (QBDT). Then, customize the report to show only sales orders and estimates. If the sales order was converted into an estimate, you'll see the Estimate Number from the Memo column. 

Follow the steps below: 

1. Go to the Reports menu and then hover to Customers & Receivables. 
2. Select Transaction List by Customer. 
3. Click the Customize Report button.
4. Set the report date range from the Dates menu. 
5. Go to the Display tab, then scroll down to the Columns option, make sure to include the Memo and Num column.
6. Go to the Filters tab and find Transaction Type and select Sales Order and Estimate.
7. Set all the necessary filters and then click on OK. 

Refer to the following article for more information about running reports that can keep track of your sales and expenses using predefined customer, job, and sales reports: Customize customer, job, and sales reports in QuickBooks Desktop. 

Here's also a guide that can help you with customizing reports in QuickBooks Desktop. It'll help you with adding or removing columns, information, and any other information. 

Let me know if you need further guidance with your report. I'm always here to assist. Have a wonderful day!