Hi there, 

It's essential that you know when the previous administrator reconciled your account for your internal audit. I'd be happy to help you find that information. 

QuickBooks Dekstop has a report called the "Audit Trail Report", that tells you what changes affected your company's books during a specified accounting period, and who made the changes. You'll be able to see when the reconciliation took place and who made the action of completing it. 

Here's how to find the report: 

1. Choose Reports from the top menu bar.

2. Click Report Center.

3. Search Audit Trail in the report window search bar.

4. Hover over the report and click Run.

You can customize the report as needed, keeping a close eye on the date-range. I hope this helps. If you have any outstanding questions, please don't hesitate to comment down below. 

Have a great day!